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 ASTM/SEI-certified