Helmets: Adults

Giro's Flak is a no-nonsense skate-style helmet that offers full coverage on the bike and simple, street-tough good looks. It has a high-impact ABS shell delivering the assurance you need for tricks, tough trails and dirt jumping. Plus, there are 13 vents to keep you dry and comfortable and a nice retention system so the Flak stays in place. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

Giro's Hex combines progressive styling with the versatility, functionality and comfort you want for trail riding. Giro's In-Mold construction offers lightness and durability, while the 21 vents keep you comfortable no matter how hot the weather gets. There's also Giro's Roc Loc 5 retention system that ensures the Hex is secure on gnarly descents, and Giro's P.O.V. adjustable visor that keeps the sun out of your eyes so you can concentrate on the trail ahead. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm - X-Large = 61-65cm

Sleek race-inspired styling, rugged construction and a great Giro fit, that's the Saros: a fantastic road helmet from the company that defined the term. This svelte lid boasts Giro's light and durable In-Mold construction with 23 Giro Wind Tunnel vents so you'll stay comfortable on group rides, centuries and races. Plus, it sports Giro's Roc Loc 5 fit system that feels so nice you might forget you're even wearing a helmet. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

If you want to rule the trail, you need Giro's Xar—the king of all-mountain lids. It boasts Giro's In-Mold construction for lightness and durability, while there are 17 large vents to keep you comfortable even when the mercury rises. You'll also dig how Giro's Roc Loc 5 retention system keeps the Xar in place on gnarly trails and bumpy descents, and how Giro's P.O.V. adjustable visor keeps the sun out of your eyes so you can concentrate on the trail ahead. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

If your mountain biking leans more towards timing chips and podium appearances, Giro's Athlon is the helmet for you. Its Giro In-Mold construction provides low weight and durability, while the 23 Giro Wind Tunnel vents keep the air flowing so you stay comfy all-ride long. Giro's super-simple Roc Loc 5 retention system ensures a perfect fit, and the removable visor shields your eyes from the sun. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

With its internal Roll Cage reinforcement and rugged In-mold construction, Giro's Pneumo offers excellent protection no matter how fast you ride. Its 19 massive Wind Tunnel vents scoop air and channel it around your head for superb ventilation. And, the sculpted fit and Roc Loc 5 fit system will make you wonder if the Pneumo was designed especially for your head. In fact, the ventilation, light weight and superb fit are so impressive, you might wonder if you're wearing a helmet at all. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

Giro's Advantage 2 was honed to perfection in the heat of elite competition. It’s an amazingly sleek ProTour-proven time trial helmet with all the protection of your everyday-riding lid so you’ll shave precious seconds, or even more, off your personal best! Plus, it does it all with the awesome fit of Giro's Roc Loc 5 retention system and it weighs an amazingly svelte 11 ounces.

Giro's Atmos is a favorite helmet among many roadies, XC riders and cyclocross racers everywhere. It's crafted with Giro's In-Mold and Roll Cage technologies for excellent durability and low weight, plus it boasts a whopping 26 vents and Giro's Wind Tunnel venting to pull cool air in and blow hot air out, a vital feature when you're laying it all out on the race course. Maybe best of all, it utilizes Giro's Roc Loc 5 retention system for a perfect fit. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

Giro’s Air Attack was born in the wind tunnel to give you an aerodynamic advantage against the competition, the clock, and your riding buddies. This sleek road helmet uses the same frontal shape found in traditional time trial helmets for unparalleled efficiency, but Giro removed the tail, so you can use this lid on every ride in stylish comfort. You’ll love the breezy airflow and the excellent fit thanks to Giro's Roc Loc Air fit system and internal cooling channels. This speedy helmet’s durable, lightweight In-Mold construction and antimicrobial X-Static padding provides awesome comfort, so you’ll hardly notice you’re wearing this second shaver. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

Giro’s Air Attack Shield was born in the wind tunnel to give you an aerodynamic advantage against the competition, the clock, and your riding buddies. This sleek road helmet uses the same frontal shape found in traditional time trial helmets for unparalleled efficiency, but Giro removed the tail, so you can use this lid on every ride in stylish comfort. You’ll love the breezy airflow and the excellent fit thanks to Giro's Roc Loc Air fit system and internal cooling channels. Also, knowing how quickly riding conditions can change, Giro ingeniously implemented a magnetic Carl Zeiss Optics shield for quick, easy attachment and removal. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm

Giro's Aeon is the pinnacle of lightness and comfort and a great choice for your road riding. This trick lid dropped 28% off the weight of its predecessor, while actually adding features. For durability it boasts Giro's In-mold polycarbonate shell with a reinforced thermoformed Giro SL Roll Cage, and for comfort there are 24 vents with Giro's Wind Tunnel technology to draw the air through. Complementing the ventilation is Giro's Roc Loc 5 retention system and anti-microbial X-Static padding for a custom fit and exceptional comfort. - Small = 51-55cm - Medium = 55-59cm - Large = 59-63cm