Bare Mens 7mm Sport Step-In Hooded Vest 5 mm Nylon ll Neoprene, 3 mm Skin-In Face Seal, ARMOR FLEX shoulder protection. Layers Perfectly with 5 or 7 mm Sport Full Suits, Attached 5 mm Vented Hood. Skin-in seals around the shoulders, Heavy-duty front zipper with skin-to-skin internal sealing flap. Edges finished with stretch nylon binding, Double glued with SECURE-LOCK construction. The best way to stay warm and comfortable when Cold Water Diving is Layering.