Off-road mountain biking helmet featuring high protection Featuring GoPro compatibility RDlivers high value off road comfort and performance Trail-specific design with extended rear coverage AirFlow ventilation system with deep internal AirFlow channels for cooling Cinch Pro™ fit system offers optimal coverage by cradling the occipital bone for full protection, support and comfort Removable, moto-style extended protection side-snap visor Integrated magnetic mount for the Numen+ Link taillight and GoPro compatible mounting surface Size: S (51-55 cm) More Info Sport: Cycling Product code: 4718905780434 Giant Roost Matte Helmet (S)