Waterproof H2 5/10mm Polar Evoluting Hood with BibWaterproof H2 5 10mm Polar Evoluting Hood with Bib 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. Features: 3D Shaped 100 % Microcell limestone CR neoprene Glideskin seal HAVS system Super stretch nylon Bonded high quality nylon thread Reflective