The Waterproof H2 5/10mm Sandwich Polar Evoluted hood is designed for cold water and full face mask use. It features a 10mm double layer in the areas where heat is most likely to escape, and a sandwich-structured glideskin seal that fits snugly and works well with a full face mask.
Comfort is enhanced by Waterproof's HAVS (Hood Air Venting System) : one-way vents in the hood allow trapped air to escape, preventing an annoying "air pocket" from forming inside the hood. The H2 5/10mm is part of Waterproof's Polar Evoluted series, which is specifically designed for demanding, cold water conditions.