O&';Neill&';s Psycho Tech combines their exclusive TechnoButter 3 and added heat-generating TechnoButter Air-Firewall. Offered in a wide range of styles with the hi-tech features you need to stay warm and toasty in any condition. FEATURES Z.E.N. Zip Closure (Back Zip) Anti-Flush Barrier Super Seal Low Profile Cuffs Stitch-less Seam Technology Fluid Seam Weld Plasma Wrist and Ankle Seals Redzone Water Resistant Zipper Krypto Knee Padz PLUS (+) = 0.5mm Extra thickness for even more warmth