Chairs, Lighting & More Ways To Transform Your Turf: Shop Now
Home Page

Detail Images

Current Color

O'Neill Psycho One 4/3mm Back-Zip Full Wetsuit - Men's


Psycho One 4/3mm Back-Zip Full Wetsuit

For unrestricted mobility, buttery-soft neoprene comfort, and an incredible fit while you surf, turn to the O'Neill Men's Psycho 1 Z.E.N. 4/3 Wetsuit. The Psycho 1's ultra-gooey 4/3mm Technobutter neoprene holds more air bubbles so that it absorbs less water to give you a lighter, warmer, and more flexible feel. Ideal for cold to cool surfing conditions, its fluid seam welded construction uses a silicone-based urethane seal applied to the opposite side of its glued and blind-stitched seams to block out water without restricting flexibility. Plasma wrist and ankle seals also prevent flushing.

The Psycho 1's strategic seamless paddle zones and seamless shoulder design further enhance flexibility. O'Neill engineers gave the Psycho 1 a Z.E.N. back entry system with drain hole which features a pullover internal neck seal that blocks out water for maximum performance. Any water that does happen to penetrate the Z.E.N. collar or super-short zip is blocked by the Barrier-2 and forced out the drain hole. A double super seal neck also provides wide adjustability and a comfortable closure. Plus, an external key pocket with loop ensures that you're not locked out of your car or hotel at the end of the day.

  • Wetsuit for cool to cold ocean and river surfing
  • 4/3mm TechnoButter neoprene stays warm down to upper 50s
  • Z.E.N. zip closure includes rash-reducing neck liner
  • TechnoButter retains 30% less H2O than other neoprene
  • Minimal welded seams reduce chafing and boost durability
  • External key pocket wi/ loop reduces parking stress
  • Seamless shoulder make for comfortable all-day paddling
  • Item #ONE015M

TechnoButter 2 neoprene
Water Temp
Z.E.N. back zip
Seam Construction
super seam weld
Recommended Use
ocean surfing, river surfing
Manufacturer Warranty
1 year

Tech Specs

What do you think about this product?


>Rating: 5


I gave it as a gift but have feedback to share
True to size

Got this for a friend and this is what he had to say: "Stretchiest wet suit I have tried on. Very comfortable with the back zip and warm!"

>Rating: 5

Warm wetsuit for year-round use in PNW

I've put it through the wringer
True to size
Size Bought
6` 0"
158 lbs

With a hooded vest, booties, and gloves, I can use this year round in the PNW for kiteboarding. TechnoButter is super comfortable, and I love the back mobility that the Z.E.N. Zip provides when I'm out on the water. Only issue I've noticed is a little bit of pilling on the inner thighs, which is unusual because I have a small frame and there shouldn't be rubbing. I'll have to be careful to see how it plays out.