Seac Ciao 2.5mm High Stretch Comfortable Neoprene Short Wetsuit Mens Women Kids for Scuba, Snorkeling, Swimming Should fit snug, but not too tight Outer lining: Super-elastic Extra Flex nylon with Yamamoto 38 rubber. Honeycomb structure of the rubber. Inside the suit is lined with Dry Fibre lining to trap water and keep you warm while drying quickly between dives This neoprene material is made from limestone with a closed cell foam which makes it light, flexible and most importantly warm Water Barrier System Zipper Wrists and ankles: dual cone in Smooth Skin with YKK zipper