H2 5/10mm POLAR EVOLUTED HOOD The H2 5/10mm hood features a 10mm double layered protection in critical heat loss areas and glide skin seals for the neck and face. Waterproof H2 5/10mm includes the unique HAVS (Hood Air Venting System) which uses one-way valves to vent annoying air build-up in the hood. During our numerous Polar trips with Waterproof Expeditions we learned that divers underestimate the heat loss under extreme conditions. We may understand we probably need a thicker undersuit, but when it comes down to the accessories, like gloves and hoods, the options are less. Also new technology enables divers to make longer dives and with this the Hypothermia factor enters the equation. It is common that Tech Divers using Rebreathers adds on an extra hood to prevent heat loss during long and deep exposures. Waterproof looked into this and created a series of accessories we tagged as "Polar Evoluted", the H2 5/10mm HAVS is one of them. • Polar Evoluted • 3D Shaped Anatomical Sculpting • 100% Microcell Limestone CR Neoprene • Glideskin Seals • HAVS Hood Air Venting System (Double Valves) • Super-stretch Nylon • Bonded High Quality Nylon Thread • Reflective Logo • Extend Lining • Colour: Black. • Sizes: S, M, L, XL, XXL Follow the link for Size Charts