O'Neill Psycho One 3/2MM Chest Zip Men's Wetsuit (Black/Black)
O'Neill Psycho One 3/2MM Chest Zip Men's Wetsuit (Black/Black)

O'Neill Psycho One 3/2MM Chest Zip Men's Wetsuit (Black/Black)

Product Code: 18789
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O'Neill Psycho One 3/2MM Chest Zip Men's Wetsuit Now Available At S2AS

The incredible O'Neill Psycho One wetsuit is back again at S2AS. Featuring O'Neill's patented F.U.Z.E. chest zip design for increased comfort, fit and flexibility, also this helps prevent water flushing through the suit keeping you warmer. Thanks to Technobutter 3 this wetsuit is extremely stretchy helping it to fit perfectly, therefore, being a lot more comfortable and help keep the warmth in. Thanks to an increased amount of firewall throughout the suit you are guaranteed to stay warm on even the coldest of sessions. The Psycho One is easily one of our favourite wetsuits here at S2AS.


F.U.Z.E. Closure (Chest Zip)- Front upper zip entry uses a free-floating zipper panel and anti flush barrier with drain holes to keep you dry and feeling loose 

Minimal Seam Design- Designed with larger panels and less seams to increase flexibility, durability and fit.

Double Super Seal Neck- A comfortable and fully adjustable watertight glideskin seal.

Krypto Knee Padz- Protect the most venerable part of your wetsuit with this ergonomic knee protection.

Single Fluid Seam Weld- Blind stitched and triple glued seams with an exterior fluid seam weld

Limestone Neoprene- Much more environmentally friendly way of making neoprene than the classic way wetsuits where made. O'Neill has used limestone since 1966 to replace petrochemicals in their neoprene. It comes from nature and has less of an environmental impact.

Eco Carbon Black- Carbon black is one of the key ingredients in neoprene. It can now be pyrolyzed from scrap rubber tires using high heat to extract.

Technobutter Firewall Interior Jersey- An awesome insulated layer through the chest, back, thighs, butt shins and calf for extra warmth and prolonging those awesome sessions. 

Technobutter 3 exterior jersey- designed to be warm flexible and designed to last

Water Based Glue- Solvent based adhesives used in most neoprene are considered moderately harmful to the environment. O'Neill works with their key manufacturing to develop a non solvent based lamination glue called Aqua-Alpha.


  • F.U.Z.E. Zip Closure (Chest Zip)
  • Minimal Seam Design
  • Anti Flush Barrier 
  • Double Seal Collar 
  • Fluid Seam Weld
  • Arms/Shoulders/Calfs Technobutter 3
  • Chest/Back/Shins/Butt Technobutter 3 Firewall
  • Aqua Alpha Solvent Free Neoprene Lamination 
  • Eco Carbon Black In Neoprene 
  • Limestone Neoprene 
  • Dope-Dyed Yarn Jersey

Orders received by 2PM Monday-Friday are normally despatched the same day. (Large items may take longer)

Next day delivery in the UK is charged at £9.95.

Standard delivery in the UK takes 3 - 5 working days and is free with orders over £80. For further information please view our Delivery & Returns Policy.