Arai Helmets XD-4 Cover UK Frost Motocross Helmets Features: Based on rider desire or riding situations, provides three different configurations; allows you to alter your appearance every time you ride, even during the same ride. Features a moderate oval shape that fits most head shapes in North American markets. The cheek pads' design by FCS provides comfort, support, and features. High-flow peak 5 mm peel-away layer decreases drag at highway speeds and helps direct air into upper intake vents for better interior ventilation. For improved long-haul comfort, a completely replaceable, washable interior that keeps you cooler and drier is available. Peel-away side/temple crown cushions allow for an additional 10 mm of inner width.