LS2's Fast II is a technically advanced weapon for serious off road riders. The shell is made from LS2's proprietary Kinetic Polymer Alloy (KPA). This innovative material is ultra-light weight and offers a bit of energy absorbing flexibility, but with a penetration resistance that rivals high-end composites. The wide eye port accommodates most major brands of goggles. Intake and exhaust ports ensure plenty of ventilation to keep you cool, whether during a long moto, an enduro or a long day on the trail.