The Seals Skirts Surf Neoprene Kayak Spray Skirt is constructed of high-performance 4 mm neoprene and uses a 3/8 inch stitched bungee attachment to the rim to ensure a good fit. Designed to be used in extreme conditions, the Surf Sprayskirt is sure to keep water out of your boat in rough waters. High performance 4 mm neoprene. 3/8 inch stitched bungee attachment to the rim. Glued, stitched & sealed seams. Grab loop w/ integrated safety whistle. For use in extreme conditions. Seals skirts and cockpit covers are designed to fit a wide variety of boats. Seals Spray Skirt & Cockpit Cover Sizing Guide.