O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit

O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit 5 5 6
SKU: ONL5344
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The O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit is constructed from super light TechnoButter 3 and TBX neoprene to give you maximum stretch. O'Neill added 0.5 mm extra of neoprene to this model as a step-up from your normal 4/3. The seams are glued and blindstitched and fully taped with TB3X tape to create an excellent barrier while maintaining your range of motion and flexibility. The Front Upper Zip Entry system uses a free-floating zipper panel and an anti-rash barrier with drain holes to keep you dry and feeling loose.


  • Thickness: 4.5/3.5mm
  • Neoprene: TechnoButter 3
  • Internal Lining: TechnoButter 3x Interior Jersey
  • Seams: Sealed/Taped
  • Zipper: Chest Zip
  • Hood: None
  • Model Year: 2019/2020
  • Manufacturers Part Number: 5344

Product Features

  • F.U.Z.E (Front Upper Zipper Entry) uses a free floating zipper panel and anti flush barrier with drain holes to keep you dry and feeling loose
  • Right to left chest zip closure
  • 360-degree barrier with drain holes
  • TB3X fully taped seams
  • Glued and blindstitched seams
  • Full body and legs made with TechnoButter 3 neoprene
  • Arms and shoulders made with TechnoButter 3X neoprene
  • Plus (+) = 0.5mm extra thickness for even more warmth
  • Minimal seam design for insane flexibilty, fit and durability
  • Hidden key loop on right leg
  • Aqua Alpha: eco friendly solvent glue that is water based and free of VOC's
  • Limestone-based neoprene sourced from Japan


O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit Great flexibility and warmthReview by JBird JBird
Amazingly flexible for a 4/3+ suit. I noticed the extra thickness right away but the flexibility of the suit more than made up for it. Thanks to the warmth of the extra .5mm I was able to wear it comfortably in 48 degree water here in NY.
It doesn't have all the bells and whistles of the high end O'Neill suits but it also doesn't have the hefty price either. The inner lining allows you to peel off the suit very easily which is definitely welcome.
Time will tell how the suit holds up over the course of the year. If possible I'll update the review in the late fall after having worn it for 4-5 months.
(Posted on 5/19/2020) 2020-05-19
O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit perfect winter suit for SoCalReview by Billy Billy
I no longer dread winter dawn patrol. This suit is SUPER flexible, warm, extremely easy to get on and off. And it dries pretty quick for a 4/3 because there is no extra lining etc. Makes the entire experience so much more enjoyable. I'm in Southern California and I was actually worried that 4/3+ might be too much, but that hasn't been the case. Water temps have been in the upper 50s and I've been very comfortable. (Haven't needed boots in upper 50s, which is nice. One less thing to dry.) It feels like it would still be plenty warm down to mid or low 50s. I usually buy the top-of-the-line suits, with all the fuzzy linings and smooth skin chest. But I honestly do not miss any of those features. This is just as warm as my high-end 4/3 Xcel and is so much easier on and off. Not so sure about durability because of the super-stretchiness, but it does make cold water surfing much more enjoyable. The zipper is plastic which feels a little cheap. But that's my only real complaint, and who cares.
(Posted on 1/21/2020) 2020-01-21
O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit love this wetsuitReview by matt matt
This is a great wetsuit for the money - super warm for the thickness and so stretchy! It's as warm as my 5/4/3 Billibong and so light and stretchy that I almost forget I have it on. I sized it using height and weight on the size chart, and the fit when dry felt almost too small for me, but in the water it loosened up and fits absolutely perfect. Highly recommended - thanks Cleanline!
(Posted on 1/9/2020) 2020-01-09
O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit Warm and flexible Review by Angelo Angelo
I’ve only worn this suit 5 times in 57-58 degree water and so far its the most flexible and warm suit I’ve used in 35 years of surfing and wetsuit wearing. I was worried that the “+”, which O’neill indicates is an additional half millimeter of thickness, would be too much rubber but I found that not at all the case. It’s more flexible than some 3/2 suits I’ve had and really warm. Cleanline was fast with shipping and really courteous over the phone. Wish I could buy all products from them.
(Posted on 12/29/2019) 2019-12-29
O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit Outstanding!Review by Timbo Timbo
Hands down the best suit I've ever owned. Insane flex. The 4/3+ has rhe flexibility and stretch of a 2mm. Feels about as constrictive as a jacket top. It's nuts how much I can move in this thing.

The suit is pretty warm, and is great for SoCal winter dawn patrols. But I think if you were in anything much colder than mid 50s you'd probably need a bit more thickness. It's also super easy to get in and out of.

I do feel the suit runs big. I'm 6-2 and 210 lbs; I have a large and i do get some flushing at the wrists and ankles, and some bunching around the groin. Nothing major tho and since I'm pretty broad in the chest and shoulders I don't think a medium would work. Overall, this is hands down the best suit for the money.

(Posted on 12/22/2019) 2019-12-22
O'Neill Hyperfreak 4/3+ Chest Zip Wetsuit Triumphant returnReview by GhostDawg GhostDawg
I love this suit. It's the most flexible and comfortable suit I've ever owned. The 4/3+ is plenty warm for the coldest SoCal dawn patrol. It's no wonder it won 3 categories in Stab's wetsuit reviews of comparable wetsuits.

I used to buy O'Neill's exclusively but wanted to try other brands because they were a little cheaper. O'Neill's customer service is the best that I've experienced. Whenever there is a warranty issue, they take care of if properly. I've had replace panels and they re-applied the fluid seams for the entire suit. By comparison, Billabong was the worst in terms of product and service. Within 3 months, the chest panel tore and they just glued it and sent it back to me. The repair lasted less than two weeks and I had to send it to them again and they replaced the panel. The back panel was shredded within a year and they told me that sun damage wasn't covered. I rinsed the suit inside and out and dried it in the shade. Billabong doesn't stand behind their product.

O'Neill's suits are very high quality and their customer support is the best. I highly recommend this suit.
(Posted on 12/17/2019) 2019-12-17

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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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