This is the perfect hood to complement Everdry 4 neoprene drysuits and the NovaScotia semi-dry. It is made of high-stretch 100% Everflex Nylon on the outside, and on the inside a Diamond Span quick-dry fleece liner increases warmth and comfort for those extended cold-water dives. The hood comes with an air vent system, a face seal to minimize water transfer plus a double snap button in back to attach to the snap buttons on NovaScotia and Everdry 4 drysuits to ensure perfect positioning throughout the dive.