The Psycho Tech from O\'Neill combines the exclusive TechnoButter 3 neoprene and the heat generating TechnoButter Air firewall. It gives you hi-tech features you need to stay warm in any condition. The Super Seal Low Profile cuffs reliably keep water where it belongs, and the waterproof Redzone zipper helps keep water out. The Krypto knee pads and a liquid seam sealing ensure durability. In addition, the Psycho Tech offers you a windproof, smooth outer material. Whether you\'re river surfing in the Alps or surfing in Iceland, the Psycho 6/4+ can handle it. FeaturesF.U.Z.E. closure (chest zipper)360° barrier with drain holesSuper Seal low profile cuffsSeamless seam technologyWindproof smooth skin materialPlasma wrist and ankle sealsWaterproof Redzone zipperCrypto knee padsLiquid seam weldingArms/shoulders/shin/calf: TechnoButter 3Chest/back: TechnoButter 3 Air-Firewall smooth skinThigh/buttocks: TechnoButter 3 Firewall PLUS (+) = 0.5 mm extra thickness for even more warmth