The giro feature mtb helmet starts with a low profile shape with more coverage than traditional xc helmets and channeled vents that radiate heat up and out when yoursquore climbing at lower speeds this giro mtb helmet features an in mold polycarbonate shell which enhances durability yet keeps weight to a minimum when yoursquore ready to drop in the rugged in form fit system offers one handed fit and stability adjustment so you can dial in the feel and focus on the trail ahead gir