O'Neill Men's Epic 5/4mm Back Zip Full Wetsuit neoprene 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 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 5/4mm 100% UltraFlex Neoprene with FluidFlex (tm) Firewall Glued and Blindstitched Seam Construction, Strategic Seamless Paddle Zone LSD: Lumbar Seamless Design and Krypto Knee Padz Internal Thermo Chest Panel for increased insulation, 5/4 for extreme conditions Double Double Super Seal Neck, Fully Adjustable and Watertight