Troxel Low Profile Sierra Western Helmet The Sierra helmet has been completely redesigned with an entirely new low profile, but will be instantly familiar to the hundreds of thousands of Sierra helmet owners around the world. Engineered for riding extremes, the Sierra's new rugged nylon and leather covering not only looks good, but also withstands the toughest terrain on the trail. Note: Due to manufacturing the Brown may vary slightly in color, as well as contrast. Features: Low profile Riveted leather and Cordura(R) covering SureFit™ Pro Fit System Flip-Fold™ removable washable headliner with Air-Channel™ technology Mesh-covered vents ASTM/SEI-certified XL sizing (Brown and Black color only)