O'Neill Psycho Tech 4/3 mm Chest Zip Full Wetsuit

O'NeillSKU: 218453-10

Color: Black / Black
Sale price$489.95 USD
Shop Open Box or Pre-Owned


  • 4/3mm neoprene
  • Fullsuit for men
  • F.U.Z.E. Closure
  • TechnoButter 3, TB3 Air-Firewall Smoothskin, TB3 Firewall neoprene
  • For surfing in temperate water

The O’Neill Psycho Tech Chest Zip Full Wetsuit is made of 4/3+ mm neoprene. O’Neill added 0.5mm extra material, so the suit’s thickness is actually 4.5/3.5mm, providing even more warmth. This premium quality wetsuit probably has all of the available technical features, hence the name, which makes it a perfect choice for surfing in temperate waters.

Psycho Tech has Krypto knee pads that add abrasion protection to the knees. Additionally, this surfing wetsuit has Plasma wrist and ankle seals and Super seal low profile cuffs to create perfect insulation from water entering those areas.

  • TechnoButter 3 on the arms, shoulders, shins, and calfss. This unique hydrophobic material does not hold any water and thus perfectly retains body heat. 
  • TB3 Air-Firewall Smoothskin neoprene on the chest and back; and TB3 Firewall on the thighs. TB3 Firewall, the most advanced insulative neoprene available on the market, will provide extra warmth for your core. What's more, the trapped air technology makes this suit lightweight, flexible, durable, and quick-drying – a perfect combination for a high-performance fullsuit.
  • Fluid Seam Weld construction makes a wetsuit watertight, long-lasting, and ultra-stretchy. This construction includes a silicone-based urethane sealed exterior and a triple-glued interior.
  • Front Upper Zipper Entrance (F.U.Z.E.) closure. A Redzone water-resistant zipper, which creates a smaller entry, is located on the chest area. Due to its size, this closure provides extra warmth and freedom of movement. A 360° Barrier with drain holes on the back and arms below the zipper creates a seal to prevent water from entering.

O’Neill’s wetsuits stand out from other brands thanks to their excellent quality and attention to detail. These wetsuits have fewer seams, which improves their flexibility. Additionally, O’Neill Psycho Tech has seamless paddle zones providing extra freedom during paddling. All seams are glued with Aqua Alfa Solvent Free Lamination, an eco-friendly water-based solution. Furthermore, a Psycho Tech implemented a stitchless seam technology that improves its heat-retaining ability. Buy this O'Neill’s wetsuit and choose an incredibly lightweight and flexible piece of surf wear.

Product Highlights:

  • Wetsuit for surfing in temperate waters
  • Designed for men
  • 4/3mm neoprene
  • PLUS 0.5mm thicker material
  • TechnoButter 3 on arms, shoulders, shins, and calf
  • TechnoButter 3 Air-Firewall Smoothskin on the chest and back
  • TechnoButter 3 Firewall on the thighs
  • F.U.Z.E. Closure (Chest zip)
  • Redzone water-resistant zipper
  • 360° Barrier with drain holes
  • Wind-proof Smoothskin
  • Krypto knee pads
  • Super seal low Profile Cuffs
  • Stitch-less seam technology 
  • Fluid Seam Weld
  • Plasma Wrist and Ankle seals
  • Aqua Alfa Solvent Free Lamination

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