Arai Helmets XD-4 Cover Frost Motocross Helmets Features: The majority of skull forms in the North American markets are accommodated by the middle oval shape. Provides three different configurations depending on the rider's preferences or the riding environment; vary your appearance each time you ride, or even while you are on the same ride. FCS cheek pads are designed to be comfortable, supportive, and feature-rich. 5 mm peel-away layer with a personalized fit. Peel-away side/temple crown cushions allow for an additional 10 mm of inner width. For enhanced long-haul comfort, the interior is completely replaceable, replaceable, and washable.