Waterproof W7 Neoprene Neck Seal Optional compatible neoprene neckseal suitable for the W7 Fullsuit 5mm 7mm To wear when diving without a hood to restrict and minimize waterflow 2,5mm flexible neoprene with smoothskin on the outside to be folded in at the neck Attached to the W7 wetsuit with velcro Sizes 3 Men sizes and 3 Lady sizes Colour Black