*The Psycho Tech is built for the absolute harshest conditions and allows the user to surf for hours on end.*O’Neill’s Psycho Tech combines our exclusive TechnoButter 3 neoprene with TechnoButter 3 Air Firewall insulation, Stitchless Seam technology with exterior Single Fluid Seam Welding, internal TB3X Tape, and a F.U.Z.E Closure System. It is lighter, warmer, more insulating, and quick-drying, with improved ease of entry. Psycho Tech is the latest advancement in cold-water wetsuit technology from the innovators for over 70 years. PSYCHO TECH 5/4 CHEST ZIP FULL | Black