smooth skin neoprene inner at the collar, arm and legs to stick your skin tightly & make sure that much less water come inside FULL BODY SUIT-3mm neoprene diving suitKEEPING WARM). SIZE SELECTION TIPS: please do not choose according to the size you usually wear, and see the product size chart(the second picture on the left), be sure to take weight as the first reference factor, followed by height. DIVING SUIT ZIP AND NECK DETAIL- Heavy duty YKK Zipper with zipper pull/hook-and loop closure at back is easy on and off. Ultra Stretch Neoprene: Incredibly Soft Premium Material Has Superior Feel, Flexibility, And Elevates Performance Premium 3mm neoprene wetsuits keep you warm. Package includes: 1*ZCCO neoprene wetsuit Material: 90% CR Neoprene 10%nylon and spandex Size selection tips: please do not choose according to the size you usually wear, and see the product size chart(the second picture on the left), be sure to take weight as the first reference factor, followed by height. About Service: 1. Wash by hand under 30 degrees Celsius water, no twist, no washing machine 2. Do not bleach or wash with washing powder which include Bleaching ingredients 3. Put it in a cool place to dry after washing to avoid sunlight exposure directly then keep WETSUIT's elasticity 4. Don't get it in a Unventilated place such as plastic bags or high temperature place.