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You've tried just about everything to cure your cold-weather lunacy without any success. Now it's time to try a radical, new procedure. O'Neil Psycho III ZEN 4/3 Wetsuit's insane heat retaining and stretch increasing tech make head first plunges into icy salt water a logical treatment for whitecap madness. 20% lighter and 30% less absorbent, TechnoButter neoprene is the most advanced neoprene on the market, combining springsuit movement with 4/3mm insulation. Double SuperSeam silicone-based urethane welds on the inside and outside of the tripled glued seams are 60% thinner and lighter than any other weld, making suit even stretchier and lighter. 

A cold flush can turn anyone into an expletive-shouting psycho. Patented ZEN zip entry combines an internal neck-seal pullover with O'Neil's famous ZEN Collar and Super Short Zip for the best seal available. If any water does bust through, an additional internal Barrier forces the water out the Drain Hole preventing water build up and absorption.

  • 3/4mm TechnoButter neoprene
  • XDS-Air SL Firewallchest panel
  • Double SuperSeam tripled glued and welded seams
  • Z.E.N. back zip entry
  • Super Seal plasma cuffs
  • Built-in Krypto knee pads
  • External key pocket

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Psycho 3 Features close-up

Psycho 3 Features close-up

TechnoButter Neoprene (20% lighter, 30% less absorption with quick dry properties) combined with Double-SuperSeam seals (watertight stitchless tech. used on both sides of a triple-glued seam). Both are 100% exclusive to O'Neill! In the water longer, stronger, and warmer!