Description Engineered to withstand the toughest terrain, the Sierra’s nylon and leather covering looks good while protecting the shell from scratches. The comfortable, self-adjusting SureFit™ Pro system and Air-Channel™ headliner perform flawlessly to provide all day comfort on the trail or in the arena.Key features include: Low profile Rugged leather & nylon covering Mesh-covered vents SureFit™ Pro fit system FlipFold™ removable washable headliner with Air-Channel™ technology Click below to find the right size for you 2019_Troxel_Helmet_Size_Guide Click below for the Quick Fit Guide 2019_Troxel_Helmet_Fit_Guide
