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O'Neill Psycho One 4mm Chestzip Wetsuit

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Free shipping with this item
Delivery 3-5 business days
365 days return

This Psycho One wetsuit for men, from O'Neill, is at the top of their range. It provides surfers with a low weight suit with maximum flexibility. It is this wetsuit that is favored by the O'Neill Team riders. A key focus has been to design this suit to have as few seams as possible, by using larger panels, yet still providing the highest level of free movement and flexibility.


  • F.U.Z.E. Closure
    • F.U.Z.E. stands for Front Upper Zip Entry. This is similar to the Z.E.N. system in construction only mounted on the chest area. This system will have you safe and dry while feeling loose.
  • 360° Barrier with drain holes
    • This system is part of the F.U.Z.E. closure and provides you with full flushing-protection and with drain holes you are sure that the suit does not pick up any excess water that you will be carrying around.
  • TechnoButter 3 Firewall
    • A supremely lightweight and insulating layer of neoprene with a built-in foam core, a water-shedding outer smooth skin layer, and an internal heat retaining layer.
  • Technobutter 3
    • The Technobutter 3 material is an O’Neill exclusive material that is super stretchy, featherlight neoprene that has been merged with the Envy foam rubber core. The ultimate material for warmth and all-day comfort.
  • Fluid Seam Weld
    • This is an 8mm thick silicone-based urethane sealed exterior that has a triple-glued and blind-stitched interior for a watertight, durable, and ultimately flexible result.
  • Double Super Seal Collar
    • A warming dual-layer construction that features a smooth 360° skin interior lining. Fully adjustable, watertight and ensuring a secure lockdown.
Technobutter 3, TechnoButter Firewall
Fluid Seam Weld
Extra Features:
F.U.Z.E. Closure, Double Super Seal Neck
Wakeboarding, Kitesurfing, Surfing, Windsurfing, Water Skiing
Zip Type:
Chest Zip
Water Temperature:
10-14 °C
Wetsuit Type:
Eco Friendly:
Aqua Alpha Solvent Free
reviews   (12)
Everything you could want in a wetsuit what more could I say 😊🏄‍♂️🤙
Pat Aitken (Mortehoe)
Rating: 5 of 5!
Wore for the first time today,so far so good,3 hour session,very warm,very comfortable would recomend! New to oneil suits,usually buy xcel,i would say oneil much better fitting and equaly as warm. The true test is how well itll hold up over time,fingers crossed!
Jonathan H. (North cornelly)
Rating: 4 of 5!
Top wetsuit. Great fit, easy to get on and off (within reason for this type of wetsuit). Most of all keeps me warm in the water and wind (used for kitesurfing). I'm 6ft 2" with a 32" waist and went with a medium tall. Lovely stuff.
Neil R. (Herne Bay)
Rating: 5 of 5!
Amazing product as service! Highly recommended
Marco Luiz Zulauf (San Jose)
Rating: 5 of 5!
Show all 12 reviews
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