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O'Neill 4/3+ Psycho Tech Chest Zip Wetsuit

sku# 164923
O'Neill - 4/3+ Psycho Tech Chest Zip WetsuitO'Neill - 4/3+ Psycho Tech Chest Zip Wetsuit
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Product Info

Sure So-Cal is cool, but have you ever gotten pitted riding a deserted beach break on the Oregon coast in January? The O'Neill 4/3+ Psycho Tech Chest Zip Wetsuit is the cold water suit you need to expand your horizons beyond your usual surf spots. Stitch-less seam technology and TechnoButter 3 neoprene make for unrivaled flexibility, and say goodbye to cold water flushing; F.U.Z.E. chest closure and Z.E.N. back closure systems incorporate anti-flush barriers with drain holes to keep you warmer for longer.

Product Details


TechnoButter 3 [Arms, Shoulders, Shins, Calves]O'Neills exclusive, maximum stretch, hydrophobic neoprene with featherlight ENVY foam rubber core. Ultimate warmth and comfort, built to last.

TechnoButter 3 Air-Firewall Smoothskin [Chest & Back]The most advanced insulative neoprene available with even more stretch than before. Trapped air technology with quick dry and wind proof properties. Psychotically warm.

TechnoButter 3 Firewall [Thighs & Butt]Light, insulating neoprene foam core with heat retaining thermal interior layer and quick dry properties. Stretchier than ever before.


F.U.Z.E. Chest Zip ClosureO’Neill’s exclusive F.U.Z.E. (Front Upper Zip Entry) system offers a fresh alternative. Using the same free floating zipper technology as the patented Z.E.N. ZIP closure. The F.U.Z.E. closure keeps you dry and allows unrestricted flexibility.

Water Temp

48° - 54°


Stitch-less Seam TechnologyExterior Fluid Seam Weld and Interior TB3X Tape on either side of a stitch-less seam takes wetsuit construction to the next level for reliable durability and low profile comfort.

Fluid Seam Weld8mm silicone-based urethane sealed exterior with a triple glued and blind stitched interior. Watertight, durable, and ultra flexible seam.

Redzone Water Resistant ZipperUrethane coated offset zipper teeth interlock to stop leaks and keep water from entering the suit.

Krypto Knee Padz

360° Barrier with Drain Holes

Super Seal Low Profile Cuffs

Wind-Proof Smoothskin

Plasma Wrist and Ankle Seals

Aqua Alpha Solvent Free Neoprene Lamination

PLUS (+) = 0.5mm Extra Thickness For Even More Warmth


Always rinse thoroughly inside and out with fresh water after every use. Hang to dry.


  • Wetsuit Thickness: 4/3.5 mm
  • Wetsuit Fit: Chest Zip
  • Material: Neoprene
  • Seam Sealing: Fully Taped, Glued and Blindstitched Seams, Welded Seams
  • Manufacturer Item Number: 5337
  • Warranty: 1 Year

Other Notes

O'Neill products can only be shipped within the United States and Canada



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