O'Neill Men's Epic 4/3mm Back Zip Full Wetsuit Ideal Value Driven Wetsuit; Perfect For Surfing, Diving, Paddle Sports, Lake Activities, And Beach Days Backzip System Provides Easy Entry And Exit With A Water Tight Seal. Krypto Knee Padz Ultra Stretch Neoprene: Incredibly Soft Premium Material Has Superior Feel, Flexibility, And Elevates Performance Seams Are Blind Stitched And Triple Glued (GBS); Keeping Water Out And Increases Durability Of The Product Wind-Resistant FluidFlex Firewall Panels Provide Extra Insulation And Protection Against The Cold