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360 775 2741

O'Neill Psycho Tech TB4 5.5/4mm Men's Front Zip Hooded Wetsuit

$540.00 O'Neill Psycho Tech TB4 5.5/4mm Men's Front Zip Hooded Wetsuit SKU: 5506-A00-S
Regular price

O'Neill Psycho Tech TB4 5.5/4mm Men's Front Zip Hooded Wetsuit

O'Neill Psycho Tech TB4 5.5/4mm Men's Front Zip Hooded Wetsuit range focuses on ultimate warmth and durability with high-performance recycled materials and water-tight double-sealed stitchless seams. Sustainable TB4 Firewall technology radiates throughout with TB4 Duraskin Air Firewall in the chest and back to shield against the cold while retaining and recirculating your body heat. Designed to keep you in the water longer, toasty, and stoked.


  • F.U.Z.E. Closure (Chest Zip)
  • Redzone Water Resistant Zipper
  • 360 degree Barrier With Drainholes and Anti-Flush Barrier (F.U.Z.E.)
  • Super Seal Cuffs with Plasma Wrist and Ankle Seals
  • Recycled Oyster Shells and Eco Carbon Black Infused Neoprene
  • Recycled Dope-Dyed Yarn Jersey
  • Aqua Alpha Solvent Free Neoprene Lamination
  • Key Pocket with Loop
  • Stitchless Exterior Fluid Seam Weld Technology with Interior Recycled TBX Tape
  • Chest / Back: TB4 Duraskin Air Firewall
  • Thigh / Butt / Shins / Calf: TB4 Firewall
  • Arms / Shoulders: TechnoButter 4
  • Entry: TechnoButter 4X
  • PLUS (+) = 0.5mm Extra thickness for even more warmth



Paul P.


O'Neill TB4 Psycho Tech 5.5/4mm Men's Front Zip Hooded Wetsuit - At a Glance

If you live in the PNW and want to get out on the water throughout the year, a warm suit is a necessity. It could be a matter of life or death, but mostly it’s just about comfort. Sessions are longer and more enjoyable when you’re warm and comfortable and the psycho provides both comfort and warmth in spades. I’ve been getting out on the lakes, rivers, bays and oceans here all four seasons for more than 20 years. I’ve worn out many wetsuits from many manufacturers, but the suit I keep coming back to is the Psycho Tech. The first psycho I used had TechnoButter 2 insulation. It was impressively light and stretchy. I still own that suit which is still working well when the water isn’t frigid. In fact, it really feels more like a 4/3 than the 5.5+/4 stamped on the sleeve. Reviews at the time warned that the psycho’s weren’t as durable as other brands, but I didn’t find that to be true. If you’re careful pulling it on and take care of it, it will last hundreds of sessions. Since purchasing my first psycho I have picked up others in TB3 and the latest in TB4. Comparing the suits from various model years it’s clear that they have only experienced minor refinements and tweaks in panel layout and shaping, most likely to increase the durability and life of these outstanding suits. Stitching and seam welding has gotten more robust with each generation. The liner has been upgraded too, includes some recycled yarn and is now super soft and dries faster than ever. The suit is actually noticeably stiffer in a few panels than the TB2 and it is a little harder to get on and off. I suspect some of the increased stiffness is due to the greener recipe used in the latest neoprene (which somehow incorporates recycled oyster shells), solvent free lamination, more extensive stitching and the plasma cuffs that seal out water. The tradeoff of the extra time needed to get in and out of the suit is its unsurpassed warmth. One thing that keeps me coming back are the details like the FUZE entry and Redzone zipper. I’ve found the O’Neill zipper to be very robust and reliable and easy to open and close. I appreciate that you don’t have to try and align a zipper car under my chin when it’s cold and I’m wearing gloves. The psycho isn’t cheap, but quality like this rarely is. If you spend a lot of time in cold water, the return is well worth the investment.

- Paul P.


We understand that in some situations returns or exchanges may be necessary.

Its important to us that you're stoked about what you've purchased from Kite Paddle Surf. If you are not 100% satisfied with your purchase give us a call (360 775 2741), or email us, we want to make it right. On returns, all items must be in new condition with original tags, packaging and a receipt.

We are not able to take returns or exchanges on wetsuits that have been in the water so, please make sure it fits BEFORE you get in the water.

Click here for our full Return Policy.