Pinnacle 7 mm Merino Lined Zippered Dry Suit Hood: * Warmest Hood Available! * Keeps Dry Suit Diver"s Head Warm and Comfortable in Severe Water Temperatures * Material: 7 mm Titanium Lined Nylon ll Neoprene in Head and Neck Areas * Merino Lining: 35% More Thermal Efficiency then Standard Neoprene Rubber