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O'Neill Mutant 4/3 Wetsuit with Hood

O'Neill Mutant 4/3 Wetsuit with Hood 4.8 5 9
SKU: ONL4761
Eligible for FREE SHIPPING!

Availability: Out of stock

Regular Price: $379.95




The O'Neill Mutant 4/3 Wetsuit converts for performance in an optimal range of conditions by allowing you to easily go from a full hooded wetsuit to a regular chest zip suit with just a few zips. When days are cold and gloomy the Mutant keeps you cozy in a cocoon of cushy neoprene. When the water temperatures creep up and the sun comes out, zip, toss the hood, then zip zip and enjoy. Simple, functional and great for year-round surfing.

Flexible and warm, the Mutant features Watertight Stitchless Technology and insulates your core with lightweight, toasty TechnoButter Firewall which absorbs the sunshine and blocks the wind chill. Multifaceted to suit an array of conditions and built with durable, high quality materials, the Mutant Wetsuit is a killer suit that has earned a hefty following of fans for good reason.


  • Thickness: 4/3mm
  • Neoprene: Ultraflex DS
  • Seams: Sealed/Taped
  • Zipper: Chest Zip/Modular Closure
  • Hood: Fully Attachable/Detachable Zip in Hood
  • Model Year: 2018/2019
  • Manufacturers Part Number: 4761

Product Features

  • Modular Closure System, dual cinch, interchangeable neck and hood depending upon the conditions
  • UltraFlex, ultra stretch super soft neoprene for superior feel, flexibility, durability and high performance
  • TechnoButter Firewall, the most insulative, lightest neoprene core ever. Water shedding exterior smooth skin with heat retaining thermal interior layer
  • Fluid Seam Weld, 8mm silicone-based urethane sealed exterior with a triple glued and blind stitched interior. Watertight, durable and ultra flexible seam
  • Single seal neck
  • Krypto knee padz
  • External key pocket with loop
  • Plasma wrist and ankle seals
  • Contortionist seamless shoulders
  • Lumbar seamless design
  • External key pocket with loop


O'Neill Mutant 4/3 Wetsuit with Hood Good suit, but too thinReview by Guy from Morro Bay Guy from Morro Bay
Like the suit, but wears like a 3/2. Felt thin/light when I first handled it. Could feel the 54* water temp through the legs and sleeves. I wasn't cold, but would like to not feel coolness of the water at all. Great flexibility though. Feel like I could get away with a 5/4 Mutant for the weight/flexibility I expected from a 4/3. Two-piece zipper was a little more difficult to close than the integrated zipper on my other chest zip 4/3.

Clean Lines provided unbelievable service; order came with a shirt, wax, and Starbursts!
(Posted on 7/12/2019) 2019-07-12
O'Neill Mutant 4/3 Wetsuit with Hood Great PurchaseReview by Frank Frank
Surfed in 45 degree-stayed warm and movement was great. Only issue was the front sipper got stuck.
(Posted on 5/13/2019) 2019-05-13
O'Neill Mutant 4/3 Wetsuit with Hood New surferReview by Love it! Love it!
I'm new to surfing, but I'm enjoying this suit and getting it in the water a while lot. Staff at Cleanline were super helpful. Would definitely buy from again!
(Posted on 2/20/2019) 2019-02-20
O'Neill Mutant 4/3 Wetsuit with Hood like a gloveReview by ofrota ofrota
I’ve been buying Rio Curl wetsuits for more than 10ys and decided to go with O’neill this time. Not only the warm factor was perfect for SoCal, but the wetsuit fits like a glove. Haven’t used the hood yet, but feel confident for the chill waters. That said, not surprised with the amazing customer service from Cleanline, this surf shop is amazing.
(Posted on 12/20/2018) 2018-12-20
O'Neill Mutant 4/3 Wetsuit with Hood Wait, is this a dry suit?! Review by Joe Joe
Yes it’s that good. I picked one up for winter after hearing all about them. They live up to the hype. The seals are fantastic and keep you sealed and warm. Surfed in low 50’s today and it had be toasty all session. Go get yourself one.
(Posted on 10/27/2018) 2018-10-27
O'Neill Mutant 4/3 Wetsuit with Hood MutantReview by Eddie Eddie
This is the second O'Neil mutant wetsuit that I've owned. I love the ability to interchange the hood. The previous mutant wetsuit that I had was wearing out so it was time for a new one and once again this didn't disappoint. Just surfed at short sands and the water temp was probably mid 50's. My body was toasty warm in the suit.
(Posted on 7/24/2018) 2018-07-24
O'Neill Mutant 4/3 Wetsuit with Hood Stoked Review by Brian Brian
A friend recommended this suit and I’m stoked. It’s been one of the coldest winters in a while and I’ve been warm every session.
(Posted on 1/30/2018) 2018-01-30
O'Neill Mutant 4/3 Wetsuit with Hood Awesome SuitReview by todd todd
I would write a full review but the first review said what I was thinking.
(Posted on 12/18/2017) 2017-12-18
O'Neill Mutant 4/3 Wetsuit with Hood Best wetsuit I've ever wornReview by Gerry Gerry
The Mutant is a great wetsuit for thre simple reasons:

1. It's very warm.
2. It's very flexible.
3. It has the versatility of being hooded or un-hooded.

The secret behind the warmth is all of the seals work exceptionally well. It's a simple equation, when you take a bath how cold you get is proportional to how much water gets in at your wrists, ankles, and neck. The Mutant is almost a dry suit. I am particularly impressed with how good the neck seal is.

A lot of companies brag about how flexible their particular neoprene is. In my opinion O'Neil has them beat. I can move freely in my Mutant and that translates to being able to paddle.

I like being able to use the suit with or out the hood. Typically, I find a hooded suit warmer because the hood reduces the flush factor and keeps your head warm. But I always feel a little confined I with the hood on. Now I save the hood for really cold days and wear a beanie on in between days. The neck seal on the Mutant does a great job of keeping the water out.
(Posted on 12/28/2016) 2016-12-28

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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


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 2020.

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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