Psycho Tech 4/3+mm Chest-Zip Full Wetsuit - Men's
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Quantity
Warning: California Proposition 65
Why We Like The O'Neill Psycho Tech 4/3+mm Chest-Zip Full Wetsuit
We zip up the O'Neill Psycho-TechWetsuit before hitting the water to ensure we're warm and covered for the duration of the session. The 4/3+ thickness lends itself well in cool to cold water thanks to the extra 0.5 millimeters of insulation, and it can even fluctuate into warmer temperatures with ease. This versatility is provided by the combination of the TechnoButter 4 and Technobutter Firewall fabrics that combine to keep water out, move with you, and trap air for impressive warmth.
Details
- Full wetsuit that thrives in a wide range of water temperatures
- Technobutter 4 fabric is strong, hydrophobic, and durable
- TB4 Firewall layer traps air against the skin for excellent warmth
- F.U.Z.E chest entry makes for quick and easy entry and exit
- Fluid seam welds are watertight, durable, and ultra-flexible
- Double seal collar keeps water out so that you stay warm
- External Key pocket with loop keeps your goods secure
- Item #ONEG3KC
- Responsible Collection
- Recycled/Repurposed
- Material
- TechnoButter 4 (recycled oyster shells, Eco Carbon Black neoprene, recycled jersey)
- Style
- full
- Water Temp
- 52–63°F
- Thickness
- 4.5 / 3.5mm
- Hood
- none
- Zip
- F.U.Z.E. (chest), Redzone water-resistant
- Gaskets
- 360-degree Barrier, Anti-Flush Barrier, Super Seal Cuffs, Plasma wrist and ankle seals
- Seam Construction
- [external] fluid seam weld technology, [internal] recycled TBX tape
- Activity
- surfing
- Manufacturer Warranty
- 1 year
Reviews
Q&A
What do you think about this product?
Overall Rating
5 based on 2 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.View
Selecting an option will reload the available reviews on the pageJune 25, 2025
Trusted Brand, Great Fit
- Familiarity:
- I've used it several times
- Size Bought:
- M
- Height:
- 5' 10"
- Weight:
- 155
I only have a handful of surf days in Santa Cruz in this wetsuit but so far have really enjoyed it! The fit is really great for me - 5'10" 155lbs - I got a medium and all around I have no complaints on how it fits. This thing is really warm, I had zero issues staying nice and toasty in the 50 something degree water that the SC summer surf had to offer while wearing this. My only feedback, and it was from a friend, is that as part of the closure in between your shoulders on the back there is like a 3 layer overlap so there's a lot of material there. It helps with getting it on/off but you'll need to make sure everything is laying flat for maximum comfort.
October 10, 2024
Psycho Tech wetsuit
- Size Bought:
- XL
I have been wearing wetsuits for 60 years and the Psycho tech is the best one. It took 3 years to wear out the first one, so this one is the replacement.
Do you have a question about this product?
This product can expose you to chemicals including Chloroprene which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.