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The 2020 O’Neill Psycho One 4/3 Chest Zip has all the great features the Psycho One is known for in a thinner suit – perfect for those slightly warmer days.
2020 O’Neill Psycho One 4/3 Chest Zip
The 2020 O’Neill Psycho One 4/3 minimal seam madness is now available in F.U.Z.E. and Z.E.N. Zip Closures. The ultimate high-performance cold water wetsuit. Built with ultra gooey TechnoButter 3 Neoprene and ultra-minimal seam styling offers unrestricted mobility, enhanced durability and incredible fit. The Psycho One will raise your performance level to new heights.
Unsure on your size, use our helpful Size Guide
Technobutter 3 Neoprene
O’Neill’s exclusive new pre-stretched neoprene with featherlight, ENVY foam rubber core. Ultimate, flexibility, warmth and comfort. Built to last.
Single Fluid Seam Weld
O’Neill’s exterior fluid seam weld is a revolutionary seam construction that utilises a non-chafing high-grade, silicone-based urethane applied in liquid form to outside of a glued and blindstitched seam completely blocking out water without restricting flexibility.
F.U.Z.E. Entry System
O’Neill’s exclusive F.U.Z.E. (Front Upper Zip Entry) system offers a fresh alternative for the 2020 O’Neill Psycho One 4/3 Chest Zip. Using the same free floating zipper technology as our patented Z.E.N. ZIP closure. The F.U.Z.E. closure keeps you dry and allows unrestricted flexibility within your suit.
Double Superseal Neck
A toasty warm two layer design featuring a 360˚ smooth skin interior lining, wide adjustability, and a secure lock down. Fully adjustable and watertight.
Strategic Seam Paddle Zones
An ergonomic, seamless under sleeve panel that allows for unrestricted motion and eliminates wetsuit rashing. Flexible and unique design which utilizes minimal seam placement for comfort.
Sidewinder S-Curve Seams
Sidewinder S-Curve seams.
Krypto Knee Pads
Abrasion resistant, high stretch neoprene panel with ergonomic shaping for comfortable durability. Flexible and unique design utilises and extended knee pad for added durability.
External Key Pocket with Loop
Abrasion resistant, high stretch neoprene panel with ergonomic shaping for comfortable durability. Located along the lower leg inseam. Constructed with Fluid Seam Weld and UltraFlex DS neoprene, this key pocket has added strength, easy access and completely secure.
- UK: FREE standard delivery of 1-5 working days (usually 1-2 days) on all UK purchases over £79.99
- Upgrade to next day Express Delivery for £4.99
- UK Orders under £79.99: £4.99 Standard / £6.99 Express
- Europe and UK Highlands & Islands: £9.99 on all packages under 2 kg and £19.99 over 2kg
- Rest of the world and European Islands: £19.99 for all packages under 2kg and £39.99 for all packages over 2kg
VAT (Tax) Free
If you live outside the European Union, you are eligible for VAT free (20%) purchases so can save a lot of money. This is automatically deducted at checkout but please contact us if you would like further information. The prices shown on the website include VAT as standard.
If for any reason you are unhappy with your purchase, you can return it to us in its original condition (with packaging and tags intact) within 14 days of the purchase date. We can either issue an in store credit for the item, send a different size or product if you would like an exchange or refund your payment.