Waterproof H1 5/10mm High Visibility Polar Evo Hood Waterproof H1 5/10mm HI-Visibility Hood with Hood Air Venting System (HAVS) Waterproof H1 5/10mm HI-Visibility Hood w/Hood Air Venting System (HAVS) Durable Nylon ll Neoprene Rubber Exclusive Hood Air Venting System (HAVS) HAVS System (double vent valves)