The new Waterproof H1 Dive hood is a improved version of the well loved Crux dive hood. The H1 has a plush lining making donning and doffing easier along with keeping the ears warmer on your dives. The exclusive Hood Air Venting System (HAVS) uses one-way valves to eliminate annoying air buildup and features a 7 mm double layered protection in critical heat loss areas.