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O'Neill Psycho Freak 3/2 Back Zip Wetsuit

O'Neill Psycho Freak 3/2 Back Zip Wetsuit 5 5 1
SKU: ONL4957
Eligible for FREE SHIPPING!

Availability: In stock

Regular Price: $509.95


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Find everything you're looking for and more with the O'Neill Psycho Freak Back Zip Wetsuit. Featuring the most advanced materials in the market, the Psycho Freak holds nothing back when it comes to flexibility, durability, and top of the line performance. Matching a feather light air-cell rubber core to a water shedding hydrophobic exterior, O'Neill's TB3 Neoprene will not disappoint. The super soft, pre-stretched jersey retains its form for maximum flexibility and snaps back to hug the body for a snug, natural fit leaving you warm, comfortable and ready for more waves.

The Psycho Freak sets itself apart with not just the highly advanced TB3 material, but it also has 100% fully sealed seams using a 4mm silicone-based urethane seal that is applied to both sides of the triple-glued seam. Lightweight, non-chafing, waterproof and flexible, the seam seal locks in the warmth and in conjunction with the Z.E.N. back zip closure system and anti-flush barrier, keeps a water tight, flush-free suit that offers insane ease of use and incredible comfort. Suit up with confidence in premium technology evolved from over 60 years of cold-water R&D


  • Thickness: 3/2mm
  • Neoprene: TechnoButter 3
  • Seams: Sealed/Taped
  • Zipper: Back Zip
  • Hood: None
  • Model Year: 2018/2019
  • Manufacturers Part Number: 4957

Product Features

  • TechnoButter 3 Neoprene in Arms and Shoulders
  • TB-Air Firewall Smoothskin in Chest and Back
  • TechnoButter Firewall Neoprene in Lower Body and Upper Back
  • Z.E.N. Back Zip Closure System
  • Triple Glued and Blind-stitched Seam Construction
  • Stitchless Super Seam Weld both Inside and Out
  • Rash free Double Super Seal Neck
  • Barrier with Drain Holes
  • Code Red Urethane Coated Zipper
  • Super Seal Low Profile Cuffs
  • Abrasion Resistant Krypto Knee Padz
  • Secure External Key Pocket with Loop


O'Neill Psycho Freak 3/2 Back Zip Wetsuit Best suit wetsuit of my lifeReview by Jason B Jason B
Im 42 yrs old and have always had an oneil..but usually an epic or a lower end model. Recent financial situation and this amazing website have allowed me to own this amazing wet suit. Holy cow...paddled out at oceandide california 10-17-2019..water temp around 65 degrees, the suit was actually hot. That water temp is not really cold enough for this suit, itcan handle so.much colder! The surf was around 5bft and pretty awesome...suit was by far the most comfortable ive ever owned. Im 5'8 165 lbs and a medium small is perfect fit. Nothing to complain about, dont think.twice, if you want a quality suit and can affird it, this is the one to own.
(Posted on 10/24/2019) 2019-10-24

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Size Chart

O’Neill Men’s Wetsuits — 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″
MS5′6.5″-5′8.5″145-165 lbs39-41″31-33″
M5′9″-5′11″155-170 lbs39-41″31-33″
MT6′1″-6′3″160-180 lbs39-41″31-33″
LS5′7.5″-5′9.5″160-180 lbs41-43.5″33-35″
L5′10″-6′0″170-190 lbs41-43.5″33-35″
LT6′2″-6′4″180-200 lbs41-43.5″33-35″
XLS5′8.5′-5′10.5″180-200 lbs43.5-46″35-37″
XL5′11″-6′1″190-210 lbs43.5-46″35-37″
XLT6′3″-6′5″200-220 lbs43.5-46″35-37″
2XLS5′9.5″-5′11.5″200-220 lbs46-48.5″37-39″
2XL6′0″-6′2″210-230 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


Returns are easy! We understand that in some situations returns or exchanges may be necessary. We also want you to be stoked on your purchase. If you are not 100% satisfied with your purchase you may return it for a full refund, or exchange within 30 days of receiving your order. Items must be in new condition with original tags and packaging.

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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