●Multi-Impact Shell: Combined with an EVA foam liner and a polyurethane sub-shell to effectively dissipate impacts ●Interconnect Retention System: Securely holds the helmet in place under hydraulic forces, as the force of the water pushes the helmet back, the interconnect system self-adjusts to hold the helmet firmly in place ●Adjustable O-Brace Harness: Conforms to the back of the head to help keep the helmet safely positioned ●Plush, Breathable Liner: Compresses and conforms for a secure, comfortable fit and is easily removed to dry out, wash or replace ●Vented Shell: Keeps you cooler and lets water drain