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O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit

O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit 5 5 7
SKU: ONL4962
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Filling the niche between cool and frigid, the O'Neill Psycho Tech 4/3 Hooded Wetsuit takes away cold water blues in a lightweight, high tech package. Keeping a nearly identical design as the previous season, the Hooded Psycho Tech was built for insane flexibility and enduring warmth. Including the most advanced heat trapping elements, the Psycho Tech has external fluid seam welds, internal taping in critical areas and quick drying TechnoButter Air Firewall Smoothskin panels in the chest and back to block wind chill and soak up the sun's warmth.

TB3 (TechnoButter 3) neoprene incorporates O'Neill's exclusive feather-lite ENVY foam core, creating one of the lightest and most flexible wetsuit components to date. The hydrophobic TB3 is strategically placed in the shoulders and extremities giving you maximum maneuverability where you need it, while TechnoButter Firewall Neoprene cushions the thighs and waist. This tactical combination of materials and seams delivers both long term durability and a snug, comfortable fit.

Focusing on a pleasant and productive experience in coldwater conditions the Psycho Tech ensures you get all the features you need with out any of the extra bells and whistles. Wrist and ankle seals, durable knee pads, heavy duty zippers are all part of the package along with a toasty warm two-layer F.U.Z.E chest zip that keeps water from entering at critical points and seams while retaining a relatively generous entry. Offering the best bang for your buck, the O'Neill Psycho Tech is simply a high quality, high performance surfing wetsuit.


  • Thickness: 4/3mm
  • Neoprene: TB3 and TB Air Firewall Neoprene
  • Seams: Fluid Seam Weld
  • Zipper: Chest Zip
  • Hood: Attached
  • Model Year: 2018/2019
  • Manufacturers Part Number: 4962

Product Features

  • TechnoButter 3 Neoprene
  • TechnoButter Air Firewall Neoprene
  • F.U.Z.E Chest Entry
  • Single Fluid Seam Weld
  • Attached Hood with Visor and Cinch Lock
  • Water Resistant Red Zone Zipper
  • Super Seal Wrist Cuffs
  • Krypto Knee Padz
  • Key Pocket with Loop
  • Plasma Ankle Seals
  • Strategic Seamless Paddle Zones


O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit Stoked!Review by Kawika Kawika
First off, great service from Joe and the crew at Cleanline! Got me all set up with the correct size, best suit, etc. This suit is amazing! Ultra flexible/comfortable, very light, super warm, no chafing, and a great fit. Very easy to get in/out of considering it's a front zip, no need to dislocate your shoulders before peeling it off! I've used it about 6-8 times now and no signs of unraveling seams or weakening glue welds. I've had Xcel and Patagonia suits and the fit, comfort and quality of this O'Neill far exceeds theirs at a similar price point. You won't regret getting one!

(Posted on 10/30/2018) 2018-10-30
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit Dope Wetsuit! TechnoButter out of control hot!Review by tylerg83 tylerg83
Everyone is jealous of me in the water that I bought this brand new O'neill suit. Best suit on the market. TechnoButter is exactly that, butter smooth.
(Posted on 10/16/2018) 2018-10-16
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit A Grade all around!Review by Watty Watty
A wonderful shopping experience - very very easy online with my size in stock. This is a top notch suit that fits like a glove and feels like a 3/2 - amazing technology and cut. Thanks Cleanline!!
(Posted on 6/18/2018) 2018-06-18
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit Wetsuit or alien artifact?Review by jburn jburn
This wetsuit is an amazing piece of technology -- warm, flexible, light, fast drying. Best wetsuit I've ever owned. It might just be from another world; it's certainly in a class of it's own.
(Posted on 5/29/2018) 2018-05-29
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit EXCELLENTReview by JimiRincon JimiRincon
Super warm and stretchy, really enjoying it. Alsi easy on/off for chest zip with hood. Have to see how it wears but it seems well made, I always rinse suit and they all tend to last at least 2 seasons.
(Posted on 1/29/2018) 2018-01-29
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit Futuristic performanceReview by Ned Ned
By some stretch of technology, this suit has all the warmth of a 4/3 but feels as light and flexible as a 2mm suit. Really. It's in a class of its own. Or to put it in WSL terms, it's a John John Florence and the competition is a bunch of Brett Simpsons.

I owe a huge thanks to the folks at Cleanline who turned me on to the Psycho Tech (I've been an Xcel guy for the past 10 years). At any rate, they walked me through the pros and cons of a handful of 2017's wetsuits, and answered all of my questions (of which I had ton). And now, I'm toasty from Santa Cruz to B.C.
(Posted on 11/7/2017) 2017-11-07
O'Neill Psycho Tech 4/3 Hooded Chest Zip Wetsuit Amazing customer service, best suit out thereReview by Pat Pat
The guys at cleanline are hands down the most friendly, knowledgeable, and surf stoked dudes out there. Customer service is incredible. Suit arrived perfect, with a handwritten note and some extra goodies in the box. Thanks cleanline, you guys are awesome!
(Posted on 9/14/2017) 2017-09-14

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Size Chart

The staff at Cleanline Surf specialize in sizing O'Neill Wetsuits. If you have never tried an O'Neill suit before, we strongly urge you to call us for expert advice on sizing. We do have a size chart available below, but please take it with a grain of salt. For the perfect fit the first time please call and speak with one of our wetsuit experts.

XS5′7″-5′9″125-140 lbs36.5-37.5″28.5-29.5″
S5′8″-5′10″135-155 lbs37.5-39″29.5-31″
ST6′0″-6′2″145-165 lbs37.5-39″29.5-31″
M5′9″-5′11″155-170 lbs39-41″31-33″
MS5′6.5″-5′8.5″145-165 lbs39-41″31-33″
MT6′1″-6′3″160-180 lbs39-41″31-33″
L5′10″-6′0″170-190 lbs41-43.5″33-35″
LS5′7.5″-5′9.5″160-180 lbs41-43.5″33-35″
LT6′2″-6′4″180-200 lbs41-43.5″33-35″
XL5′11′-6′1″190-210 lbs43.5-46″35-37″
XLS5′8.5″-5′10.5″180-200 lbs43.5-46″35-37″
XLT6′3″-6′5″200-220 lbs43.5-46″35-37″
2XL6′0″-6′2″210-230 lbs46-48.5″37-39″
2XLS5′9.5″-5′11.5″200-220 lbs46-48.5″37-39″
3XL6′0″-6′3″230-250 lbs48.5-51″39-44″
4XL6′1″-6′4″250-270 lbs51-53.5″44-48″

Full O’Neill Wetsuit Sizing Chart



If the product is found to be defective under normal use and proper care, O'Neill will repair or replace the product at our sole discretion. The decision to replace or repair a product is made by the O'Neill Warranty Department after receipt of the defective product. At no time does the O'Neill offer refunds. Defective product should be returned clean and dry, postage prepaid. Please include a note with product description, product defects, requested action, return address (be sure to include postal code, especially for Canadian addresses), daytime phone number with area code, customers name and a copy of the purchase receipt sent to the address below.

Suits without a copy of the purchase receipt will NOT BE COVERED UNDER WARRANTY.


  • Products classified as seconds
  • Fading from sunlight
  • Alterations
  • Materials over 1 year (from date of original purchase), or 90 days for accessories
  • Repairs or alterations done by anyone other than O'Neill or an O'Neill authorized repair facility
  • Warranty request without original receipt


Flat-Stitched Products, Glued and Blindstitched Products, and Fluid Seam Weld Products

  • Limited 1-year warranty (from date of original purchase) on workmanship and materials.

Neoprene Dry Suits

  • Limited 1-year warranty (from date of original purchase) on workman ship and materials (waterproof zipper excluded)


  • Limited 90-day (from date of original purchase) warranty on workmanship and materials


For repairs received from the dealer or end user, O'Neill offers:

  • 10 Business Day Turnaround for warranty Stitched Suits
  • 10 Business Day Turnaround for warranty Glued Suits
  • 20 Business Day Turnaround for warranty Fluid Seam Welded Suits
  • 30 Business Day Turnaround for all Non-Warranty Repairs

Repairs are to be returned clean and dry, postage paid. Please include the name and a daytime phone number with area code, return address, product description, and requested action.

Send Repairs To:

O'Neill U.S. Warranty Repair
1022 Bay Marina Drive, Suite 140B
National City, CA 91950
Tel: 1-800-331-1637


We understand that when purchasing gifts, returns and exchanges can be necessary, which is why for the Holidays we are extending our Return Policy so that anything purchased as a gift this Holiday Season is eligible to be returned by the end of January. If you are not 100% satisfied with your product you may return it for a full refund, or exchange by the end of the month of January 2019.

Please make sure your wetsuit fits before taking it in the water. We are not able to take returns or exchanges on used wetsuits.

Please reference our full Return Policy.

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