Adults

An all-around, road racing helmet that is light, cool, fast, and features the added protection of Mips. Light is fast. Fast is cool. Velocis Mips is now lighter, cooler, and faster than ever thanks to insight and feedback from Trek-Segafredo. And with a full suite of pro-level features, this helmet is bound for the podium. Velocis is designed with protection front and center. This helmet earned a Virginia Tech 5-STAR safety rating and features a Mips Air safety system. Product details: - Trek's lightest road helmet is now even lighter, saving grams and providing more comfort - Improved ventilation and channeling keeps you cooler and moves you faster - The Mips Air system is light, cool, and designed to improve comfort and protection - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Beveled front edge improves field of view while riding in the drops and on the hoods - 5-STAR Virginia Tech safety rating - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over Trek Velocis Mips – Light, fast, cool Designed to meet the everyday demands of Trek-Segafredo, Velocis is a versatile helmet that excels anywhere you ride. It’s lighter, cooler, and faster than ever before and, with added tech like the Mips Air safety system, a customizable BOA® fit system, and secure sunglasses storage, you’ll be ready for an epic day in the mountains or chasing local KOMs.

Electra has always brought you the styles and functional designs you love in the world of cruisers. Now, with their Solid Color Helmet, they keep you looking stylish while keeping your dome safe. This understated, savvy lid offers a variety of sweet color choices to meet your style needs. - Durable ABS hardshell and EPS foam liner max comfort and protection - Fit retention system with reflective bubble decal - Solid color to match any bike. Well, at least your favorite bike. - Secure magnetic Fidlock buckle - Heat sealed and washable padding liner for added comfort - Reflective straps - CPSC Adult Certified Size: - Small: 48-54cm - Medium: 55-58cm - Large: 59-61cm

Electra has always brought you the styles and functional designs you love in the world of cruisers. Now, with their Graphic Helmet, they keep you looking stylish while keeping your dome safe. This bold lid offers a broad variety of graphic choices so you can express yourself with gusto. - Durable ABS hardshell and EPS foam liner maximize comfort and protection - Fit retention system with reflective bubble decal - Secure magnetic Fidlock buckle - Heat sealed and washable padding liner for added comfort - Reflective straps - CPSC Adult Certified Size: - Small: 48-54cm - Medium: 55-58cm - Large: 59-61cm

Bontrager Charge WaveCel Commuter is a fashion-forward helmet that earns top marks in style and safety. It’s perfect for commutes, e-bike rides, and everyday adventures, and it's built with the most advanced helmet safety tech available so you don’t have to choose between fashion and function. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Rear Blendr mount system easily integrates Bontrager light accessories - Soft, comfortable, moisture-wicking, and washable helmet pads - Built-in visor provides constant coverage against sun and rain - Reflective elements on back of helmet offer enhanced visibility to be seen - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

All-purpose, value-packed helmet balances performance and comfort. Value-packed protection Wear it and believe it. The Solstice is proof you don't have to spend a lot of money to get a great fitting, easy-to-use cycling helmet designed to keep you protected during all your bike riding adventures. Product details - Designed for larger vents and increased airflow while maintaining structural integrity - Built-in and removable visor options give you two choices for constant coverage - Intuitive, one-handed Headmaster fit system adjusts height and circumference - LockDown dividers make helmet strap management clean and easy to adjust - Internal, recessed channels move airflow over your head to keep you cool and dry - Soft, comfortable, moisture-wicking, and washable helmet pads - Crash Replacement Guarantee provides free helmet replacement if it is involved in a crash within the first year of ownership Specifications - Size (head circumference): Small/Medium (51-58cm); Medium/Large (55-61cm) - Fit system: Headmaster II - Pad material: Moisture wicking pads - Buckle type: Standard buckle - Includes: Visor plugs - Weight: 290g (Small/Medium)

When it's time to hit the road, the Agilis MIPS offers a sporty, sleek style with comfortable features you can count on, including 32 wind tunnel vents, Coolfit anti-microbial padding, and integrated MIPS technology. The fit on the Agilis MIPS is comfortable and secure thanks to our adjustable Roc Loc 5.5 MIPS system that combines fit and positioning adjustments while integrating with MIPS technology for an added measure of protection in the event of an angled impact. The outer Hardbody shell extends to the inside of the helmet, and is molded from a tough polycarbonate thats fused permanently to the EPS foam liner using our In-Mold process to enhance durability and ventilation without excess bulk. - 32 Wind tunnel vents with internal channeling - Full-wrap in-mold polycarbonate shell with EPS liner - Coolfit anti-microbial padding - Featherweight webbing with Slimline buckle - Roc Loc 5.5 MIPS fit system

If you're going to wear a helmet on your Electra, wear an Electra on your helmet. - Durable ABS hardshell for protection and EPS foam liner for security - Detachable visor for when you want sun protection, velcro for when you don't - Fit retention system provides secure and snug fit - Easy to use magnetic Fidlock buckle - Size SMALL fits circumference 48cm - 54cm and hat sizes 6 1/2 - 6 3/4 - Size MEDIUM fits circumference 55cm - 58cm and hat sizes 6 7/8 - 7 1/4 - Size LARGE fits circumference 59cm - 61cm and hat sizes 7 3/8 - 7 5/8 - Small size generally fits children while medium and large sizes fit adults

We love what's inside of that head of yours Keep it safe with an Electra Commute MIPS Helmet. The perfect balance of form and function, these stylish and sleek helmets are our most advanced yet. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientists to help reduce rotational forces on the brain caused by angled impacts to the head. Electra helmets: Making messy hair business professional. - MIPS Brain Protection System - Fit retention system ensures easy adjustment and secure fit - Magnetic Fidlock slide buckle - In mold EPS with PC shell for maximum comfort and protection - Certified to NTA 8776 standard and is ideal for e-bike riders

The Macator is a sporty entry-level helmet for cyclists looking for an outstanding all-around helmet. The Macator not only has comfortable padding but also offers excellent ventilation. - In-Mold: Lightweight, durable helmet with a long-lasting combination of EPS core and Polycarbonate shell - Bug mesh: Full protection from insects - Ponytail compatibility: Perfect fit for people with long hair - Full-ring: Adjustable ring connected to adjustment system enclosing all of the head - Excellent ventilation with 5 air inlets and 8 air outlets - Zoom Ace: Finely adjustable fit system with handy adjustment wheel for a customizable fit Sizing: - Medium: 51-55cm - Large: 52-58cm - X-Large: 58-62cm

Weighing in at 235 grams, the G1 MIPS is the lightest helmet we have ever made. It is the climbers’ favorite on the ProTour. Not only is it a featherweight, but it’s extremely well ventilated. Twenty-two vents and internal air channels create 8% more airflow over the head than wearing no helmet at all. It’s also comfortable—vital for long days in the saddle. The Super Lightweight ARS Fit System ensures a snug and comfortable fit with no pressure points. The head basket is adjustable. Two sets of pads are included so you can choose between superlight and comfort pads. Awarded the esteemed Virginia Tech 5-Star “Best Available” protection rating, you can trust that the G1 MIPS is a great choice. The MIPS system helps reduce the risk of rotational injury. When you’re after every bit of speed, the addition of the Aeroshell (sold separately) transforms the G1 MIPS into an aero helmet. - Lightweight - Well ventilated (22 vents) - Advanced Rollsys system - Comes with race and comfort pads - Lazer Aeroshell compatible (sold separately) - UCI World Tour helmet - MIPS layer - Construction: In-Mold, EPS foam, polycarbonate, nylon - Weight: 235g - Certification: CPSC

ALLL-ROUND HELMET The Macator is a sporty entry-level helmet for cyclists looking for an outstanding all-round helmet. The Macator has not only a comfortable padding but also offers an excellent ventilation, and it comes in a variety of bright, highly-visible colors. In-Mold: Lightweight, durable helmet with a long-lasting combination of EPS core and Polycarbonate shell - Bug mesh: Full protection from insects - Ponytail compatibility: Perfect fit for people with long hair - Full-ring: Adjustable ring connected to adjustment system enclosing all of the head - Excellent ventilation with 5 air inlets and 8 air outlets - Zoom Ace: Finely adjustable adjustment system with handy adjustment wheel for customizable fit

FOR OFF-ROAD ADVENTURES An ideal off-road helmet for the first rides on uneven terrain. The MoTrip promises a high level of comfort for your rides over hill and dale. The deep fit of the MTB helmet ensures the best possible protection for the head. To make off-road rides more comfortable, the MoTrip is also equipped with the MTB adjustment system. This enable both individual size adjustment and height adjustability using the adjustment wheel at the back of the head. This is a great advantage for ponytail wearers, as they can make room for a ponytail by adjusting the height. Go on off-road adventures with the lightweight and well ventilated bike helmet or alternatively wear it for commuting. - In-Mould for a permanent bond between the outer shell and the shock-absorbing helmet material (EPS) - Zoom Ace MTB: Height-adjustable adjustment system to fit the head circumference - Ponytail compatibility: Helmet well suited for ponytail wearers - Adjustable strap divider - Height-adjustable visor - Ventilation: excellent ventilation through 6 air inlets and 8 air outlets

An off-road helmet with WaveCel technology that balances comfort and performance for trail riders who value safety. - WaveCel advanced helmet technology - Virginia Tech 5 STAR safety rating - BOA® Fit system lets you easily secure and adjust your helmet with one hand - Adjustable visor offers multiple coverage options - LockDown dividers make helmet strap management clean and easy to adjust - Soft, comfortable, and moisture-wicking washable helmet pads

Proven MIPS Coverage for Superior Open-Face Performance The Speedframe MIPS Helmet has premium features usually meant for much more expensive helmets. A MIPS liner, goggle compatible 3-position visor, and our 360-degree fit make the Speedframe one of the best values in an open-face helmet. Add in the legendary aggressive Fox design DNA, and you have one of the most shred-ready trail helmets in the market today. Features - Proven MIPS impact protection system reduces rotational forces in a crash - Removable, washable moisture-wicking comfort liner - Optimized venting with channeled, in-molded EPS provides efficient cooling - Goggle compatible, 3-position adjustable visor - 360 Fit System allows you to dial in your perfect fit every ride - Weight: 360g Sizing - Small = 51 – 55cm - Medium = 55 – 59cm - Large = 59 – 63cm Certifications - CPSC - EN 1078 - AS/NZS 2063

Bontrager XXX WaveCel delivers high-performance protection and the best in aerodynamics and comfort. XXX is the WaveCel helmet of choice for the Trek-Segafredo men's and women's teams. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Easy-to-use adjustable strap dividers allow for a fine tune fit - An aerodynamic shape helps you outsmart the wind and ride faster - AgION antimicrobial pads wick away moisture and eliminate odors naturally - Additional NoSweat pad with silicone channel keeps sweat out of eyes for constant clarity - Team Trek-Segafredo sticker kit included with Viper Red, White, and Visibility Yellow colorways - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

Ultra-versatile helmet that is light, cool, and sleek with the added protection of MIPS and the convenience of magnetic light mounts. If you could only buy one helmet, this is the one. Whether your finish line is on the race course or to the front door of your destination the Bontrager Circuit MIPS road helmet will deliver. Equipped will all the best features including MIPS brain protection system, Boa fit system for superior comfort and security, and the Blendr mount system for light and camera integration. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - Blendr mount system easily integrates GoPro camera and Bontrager lights accessories - The Boa System lets riders easily secure and adjusts helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - AgION antimicrobial pads wick moisture and completely eliminate odors naturally - LockDown dividers make helmet strap management clean and are easy to adjust - Internal, recessed channels move airflow over your head to stay cool and dry - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

Take your protection to the next level. Bontrager Specter WaveCel offers the best in versatility and comfort for everyday rides on roads, trails, gravel, and more. From dirt to pavement, fast or slow, this new wave of protection delivers the confidence you need anywhere you ride or race. WaveCel is a collapsible cellular structure that lines the inside of the helmet. This Bontrager-exclusive technology disrupts the safety standards the industry has accepted for over 30 years. - WaveCel advanced helmet technology - The Boa System lets you easily secure and adjust helmet fit with just one hand - Fidlock magnetic buckle fastens effortlessly for a quick, secure fit - Highly ventilated design offers more airflow to keep you cool - Soft, comfortable, moisture-wicking, and washable helmet pads - Reflective elements on back of helmet offer enhanced visibility to be seen - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership Sizing: - Small: 51-57cm - Medium: 54-60cm - Large: 58-63cm

The Register MIPS helmet combines sleek design and lightweight construction to match your style, on the road or trail. Made in a comfortable Universal Fit size with Giro's convenient Roc Loc Sport fit system, the Register MIPS adjusts with a simple turn of the dial so you can tune the fit in seconds. A range of colors lets you choose exactly how your on-bike style comes together. Register MIPS models also have an integrated Multi-Directional Impact Protection System, which can redirect energy and provide more protection in certain impacts.

The Proframe helmet is the lightest and most breathable full face helmet Fox has ever created. Designed to perform at the highest levels for the aggressive all mountain rider and enduro racer, it packs DH certified protection into a superlight shell via Fox's patent-pending, fully-integrated Chinbar. With 24 Big Bore vents, the Proframe offers open face level airflow and breathability to keep you cool on even the longest and most challenging climbs; and once you reach the top, it gives you the confidence to ride to your limits on even the toughest of descents. Features: - Ultra-lightweight enduro and all mountain helmet - Patent pending integrated chinbar - Highly breathable, moisture wicking and anti-microbial liner - 24 Big Bore vents for unrivaled breathability - Fixed visor is positioned perfectly for maximum air flow - Fidlock SNAP helmet buckle provides quick entry and exit - MIPS™ impact protection system reduces rotational forces in a crash - Dual density Varizorb EPS liner provides improved protection - Our lightest DH certified helmet: 750g. (size medium) Certifications: - ASTM F1952 (including chin bar rigidity test) - EN 1078 - AS/NZ 2063 - CPSC

A comfortable, versatile helmet with clean aesthetics and the added protection of Mips. Style, comfort, and protection for any ride The Trek Solstice Mips helmet is the perfect choice for riders who want to dabble in road and trail riding. It's super comfortable, has an easy to use fit system, and features a simple, clean aesthetic that easily transitions from path to pavement. This helmet also features a Mips safety system, which is a helmet technology designed to help protect riders from rotational forces that occur during some cycling-related accidents. Solstice Mips has also earned a 5-star safety rating from Virginia Tech. Product details: - Mips safety system helps provide additional protection from rotational forces in the event of certain cycling-related accidents - Refined styling with removable visor easily transitions from road to trail - Large vents and recessed channeling keep you cool on warm days - Trek Headmaster 3 fit system provides simple and secure adjustability with just one hand - Soft, comfortable helmet pads wick moisture and are easy to wash after a full day of fun - Covered by our Crash Replacement Guarantee, which provides a free helmet replacement if involved in a crash within first year of ownership - 30-Day Unconditional Guarantee allows you to return your helmet if you're unsatisfied for any reason

For trail or town Built for riders who live active lifestyles and want to stay protected, the Quantum cycling helmet looks just as good as it fits. Featuring MIPS, Multi-directional Impact Protection System, superior ventilation, and excellent coverage. Get it all and even more with a removable visor allowing Quantum to be your go-to helmet no matter what type of riding. MIPS (Multi-directional Impact Protection System) was developed by brain surgeons and scientist to help reduce rotational forces on the brain caused by angled impacts to the head. Key features - MIPS Brain Protection System - The Boa System lets riders easily secure and adjust helmet fit with one hand - In-mold composite skeleton increases helmet integrity for larger vent variations - Soft, comfortable, moisture-wicking, and washable helmet pads - Internal, recessed channels move airflow over your head to stay cool and dry - Removable snap-on visor and port covers provide multiple looks to fit your style - LockDown dividers make helmet strap management clean and are easy to adjust - Crash Replacement Guarantee provides a free helmet replacement if involved in a crash within the first year of ownership

The most advanced piece of technology on your bike is the one attached to your shoulders. That's why the new Mode helmet is designed to fit just right and keep you feeling, and looking cool. Its clean, elegant lines deliver more than modern style, and they integrate hidden vents for increased airflow, so you stay cool even when the temps rise. A seamlessly integrated fit adjustment system and personalized sizing lets you create a fit that's, well, dialed. Take on the city, head on, with Mode. - Hidden vent integration helps cool you off when the heat is on. - MIPS-equipped and ANGi ready. - Mode earned the highest 5-Star Virginia Tech Helmet Rating from the internationally renowned Virginia Polytechnic Institute and State University. - Reflective decals and Stix Light compatibility makes for seamless day and nighttime visibility. - The integrated fit adjustment system delivers a personalized fit and occipital base adjustment. - Whether you're riding acoustic or electric, Mode passes the Dutch e-bike Standard NTA8776 so you can can ride with confidence.

One helmet all road. The MET Allroad Mips is made for those who enjoy spending time on the saddle, whether on the tarmac or on gravel routes. Sporty on one side, comfy on the other. It's exceptionally lightweight and secure thanks to MET's distinguishing design. Perfect for your next bikepacking adventure. Featuring the MIPS-C2 brain protection system, the MET Allroad Mips is able to slide relative to the head in the case of a crash, redirecting damaging rotational motion. - In-mold polycarbonate shell with EPS liner - MIPS-C2 Brain Protection System - Snap in/out visor - Safe-T E-DUO Fit System - Vertical adjustment and ponytail-compatible - Integrated rear LED light - Reflective rear stickers - Internal air-channeling - Hand washable comfort pads - Adjustable cam divider - Certifications: CE; AS/NZS

The MET Downtown MIPS is a truly modern touring helmet, ready for a weekend trek or the daily bicycle lane. The internal air-channeling and large number of vents provide exceptional ventilation. The 360° head belt and lightweight design ensures that there will be no pressure points on the skull. Featuring the MIPS-C2 rotational management system, the Downtown is able to slide against the head in the case of a crash, redirecting damaging rotational motion. MIPS is engineered to add extra safety to the standard construction of helmets in case of certain impacts. The MIPS Brain Protection System (BPS) is attached inside the helmet, between the comfort padding and the EPS. - In-mold polycarbonate shell with EPS liner - MIPS-C2 Brain Protection System offers extra protection in the case of certain impacts - Safe-T Twist 2 Fit System - 360° head belt and vertical adjustments offer a customized fit - Straps with an adjustable divider provide a customized fit - Reflective rear decal to enhance visibility - 17 vents are internally engineered for air channeling to improve ventilation and comfort - Comfort pads are hand-washable - CE; AS/NZS; US Sizing: - Small/Medium = 52 – 58cm - Medium/Large = 58 – 61cm

The Tonic MIPS is a great choice if you're wanting a light, comfortable, and good looking helmet at a low price. It looks and feels like a much more expensive helmet, with excellent ventilation and a comfortable fit. Tonic MIPS has the Virginia Tech 5-Star protection rating. The Tonic MIPS road cycling helmet reaps the benefits of Lazer's long history of building cutting-edge helmets. The TS+ Fit System offers progressive fit adjustment and eliminates pressure points and hot spots on your head- essential for long days on the saddle. Tonic MIPS has been awarded the Virginia Tech 5-star "Best Available" protection rating. MIPS protection helps to reduce the risk of rotational injury in the event of a crash. Twenty-eight vents ensure plenty of airflow through the helmet to help you keep your cool even when the pace is on. A rear LED TS+ light can be added for enhanced visibility in low light. The Tonic MIPS weighs a very competitive 280 grams. - 28 ventilation holes - Turnfit Plus system - Rear LED light compatible - Reflective stickers - MIPS layer - Fit System: TS+ Turnfit System - Construction: In-Mold - Ventilation: 28 Vents - Weight: 280g (S) - Certification: CPSC Features: Adjustable Head Basket Allows the back part of the retention system to be adjusted up and down depending upon your preference and comfort. The nylon ratchet system can be pushed high and out of the way, or low for a feeling of increased security. Rear LED Light compatible This helmet is compatible with the integrated Rear LED Light accessory which improves your visibility from the rear in low light conditions. MIPS layer The Multi-Directional Impact Protection System (MIPS) helps reduce the risk of rotational brain injury by isolating your head from the rotation of the helmet shell in the event of an impact. Reflective stickers Reflective materials on the helmet help improve your visibility in low light conditions. Turnfit Plus system (TS+) A unique fit system which prevents hotspots or pressure points by making the adjustment around the entire circumference of your head. Ventilation Intake and exhaust vents increase airflow to keep your head cool and comfortable. 5-star protection rating The Virginia Tech impact testing uses the STAR evaluation system to determine the helmet's ability to reduce linear acceleration and rotational velocity of the head resulting from a range of impacts a cyclist might experience. 5-star indicates the "Best Available" rating possible. Virginia Tech recommends the use of any 4- or 5-star rated helmet.

Bee smart. Bee stylish. Helmets don't have to be boring. Fortunately, boring isn't in our vocabulary. Choose between awesome colors and graphics that fit your style. Electra helmets: Making messy hair cool since 2016. - Durable ABS hardshell for protection and EPS foam liner for security - Retention system provides secure and snug fit - Easy-to-use magnetic Fidlock buckle - Size small fits circumference 48cm - 54cm and hat sizes 6 1/2 - 6 3/4 - Size medium fits circumference 55cm - 58cm and hat sizes 6 7/8 - 7 1/4 - Size large fits circumference 59cm - 61cm and 7 3/8 - 7 5/8 - Small size generally fits children while medium and large sizes fit adults - Fit System: HB-80 - Pad Material: Moisture-wicking pads - Buckle Type: Fidlock buckle - Includes: Fabric visor

Ride smart. It's a no brainer. If you're going to rock a helmet on an Electra, rock an Electra on your helmet. Choose between awesome colors and graphics that fit your style. Electra helmets: Making messy hair cool since 2016. - Durable ABS hardshell for protection and EPS foam liner for security - Size small fits circumference 48cm - 54cm and hat sizes 6 1/2 - 6 3/4 - Size medium fits circumference 55cm - 58cm and hat sizes 6 7/8 - 7 1/4 - Size large fits circumference 59cm - 61cm and 7 3/8 - 7 5/8 - Small size generally fits children while medium and large sizes fit adults - Fit System: HB-80 - Pad Material: Moisture-wicking pads - Buckle Type: Standard buckle

Ride safe. Ride majestic. Helmets don't have to be boring. Fortunately, boring isn't in our vocabulary. Choose between awesome colors and graphics that fit your style. Electra helmets: Making messy hair cool since 2016. - Durable ABS hardshell for protection and EPS foam liner for security - Size small fits circumference 48cm - 54cm and hat sizes 6 1/2 - 6 3/4 - Size medium fits circumference 55cm - 58cm and hat sizes 6 7/8 - 7 1/4 - Size large fits circumference 59cm - 61cm and 7 3/8 - 7 5/8 - Small size generally fits children while medium and large sizes fit adults - Fit System: HB-80 - Pad Material: Moisture-wicking pads - Buckle Type: Standard buckle

For maximum safety, the Viantor has the ActiCage structural reinforcement integrated into the EPS. It provides maximum protection while ensuring optimal ventilation and extreme comfort. - ActiCage allows for large ventilation openings without compromising the helmet's safety - Multi Shell In-Mold for durable bonding of multi-part outer shell and shock-absorbing helmet material (EPS) - Good ventilation with 4 air inlets and 14 air outlets connected with flow channels - Zoom Ace fit system with a non-slip adjustment wheel - Semi-enclosing plastic ring connected to the adjustment system for optimum stability and fit - Ponytail-compatible and well suited for braided hairstyles Sizing: - Small: 51 – 55cm - Medium: 52 – 58cm - Large: 58 – 63cm

An aerodynamic road bike helmet that is undeniably fast, yet surprisingly light, cool, and comfortable. Less wind. More win. When speed is your top priority and every watt counts, reach for the helmet that'll cut through the wind to save you seconds. Ballista is Trek's fastest, most aerodynamically-advanced helmet. Ballista is light, cool, comfortable, and engineered with a fully-integrated Mips Air safety system that's designed to help keep you safer. Product details: - Trek's fastest, most aerodynamic helmet will save big watts and shave crucial seconds - An excellent ventilation system makes this aero helmet surprisingly cool and comfortable - The Mips Air system is light, cool, and designed to help reduce rotational forces - The single-lace BOA® fit system is fully adjustable to provide a custom, 360° fit - Rubberized sunglasses docking port provides secure and easy-to-use storage - Beveled front edge improves field of view while riding on the hoods and in the drops - 5-STAR Virginia Tech safety rating - Complies with U.S. CPSC safety standards for bicycle helmets for persons age 1 and over