O' Neill's Psycho Tech combines O' Neill's exclusive Techno Butter 2 neoprene with Techno Butter 2-Air Firewall insulation Single Fluid Seam Weld & a F.U.Z.E. Closure System. Lighter warmer more insulating & quick drying with enhanced ease of entry. The Psycho Tech is the latest advancement in cold water wetsuit technology from the leaders in innovation for over 60 years. :: Men > Wetsuits. Super seal cuffs: A bonded low profile cuff seal that keeps water out Techno Butter Air technology is a complex 3D structure of neoprene & trapped air for superior warmth Thickness: 3/2 mm Strategic seamless paddle zones: An ergonomic. seamless under sleeve panel that allows for unrestricted motion Single fluid seam weld: Non-chafing high-grade. silicone-based urethane blocking out water without restricting flex Technobutter 2-air firewall: Identical features to Techno Butter with the addition of air technology Krypto knee padz: Abrasion resistant. high stretch neoprene panel with ergonomic shaping for comfortable durability Men's O' Neill wetsuit Technobutter 2 neoprene: Extremely light with unparalleled flex & warmth Entry: Chest zip entry with a warm two layer design featuring a 360 degree smooth skin interior lining & a secure lock down