O'Neill Heat 5mm Round Toe Boots

O'Neill Heat 5mm Round Toe Boots 5 5 5
SKU: ONL4789

Availability: In stock


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The well-loved O'Neill Heat 5mm Round Toe Boots have grown a reputation as the workhorse of surf booties. These coldwater booties are built with soft, FluidFlex Neoprene and deliver all the features you need for solid performance with O'Neill's quality craftsmanship to ensure a long life of serotonin filled sessions. Offering plenty of warmth, a secure yet comfortable fit and superb durability, the Heat Boots are perfect for any surfer spending hours chasing those sumptuous cold water peaks.

Product Features

  • FluidFlex Firewall neoprene
  • Glued and blind-stitched seams
  • Interior taped seams
  • Round toe design
  • Anti-Flush shin strap
  • Forefoot strap with torsion control panel
  • Heel pull loop


O'Neill Heat 5mm Round Toe Boots Light years ahead of my last pair (from 30 years ago)Review by Bigfoot Bigfoot
I never was a fan of booties as even split toe versions would be like two giant water balloons on your feet. Then you can’t feel the board. These boots are a totly different story!

While I was scheduled to be surfing in Wales, UK right now a new job my Wife got has us delaying the trip, so I have not ocean surfed them. So what am I doing reviewing? Here in the mountains it is spring run off time on water that was snow or ice a few days ago :-)

I’ve suffered some nerve damage from having a 6,000 pound pickup truck tire drive over my scapula, ribs and spine. I should be dead so walking away with just nerve damage (ok shattered scapula needed 4 plates, 27 screws and 40 staples, 9 broken ribs and both lungs punctured) so the excruciating pain I feel when touching water below 75 degrees is the this boots test! Oh yeah, I’m size 14 with Vikings for ancestors lol.

We get truck inner tubes and shoot the creeks swollen with the melt. I put my new O’neils on and an ancient short john and walked into the creek (between 47 and 52 F) and wonder if I got the wrong boots. Are these dry boots? The two straps do a great job of keeping the water from flushing which my vintage pair could not. I never felt the cold water enter but 20 - 30 minutes later I noticed that jiggle of water in my boots yet it didn’t feel like heavy water balloons! You don’t know what a big deal this is! I’d rather drop a sledgehammer on my toes than spend 30 minutes in the water with out these boots!

I can’t comment on durability, but for heat and comfort how can you do better?
(Posted on 6/7/2018) 2018-06-07
O'Neill Heat 5mm Round Toe Boots Great fit!Review by Kelsey Kelsey
I haven't had a chance to take these out in the mid-Atlantic yet, but right out of the box, it's a great fit! I wear a women's size 8.5 so I ordered an 8 based on the size chart, which I would say is accurate. I think O'Neill tends to run thin/narrow, which actually works out great for my feet. I appreciate the thoughtful touches from Cleanline Surf- they threw in some starbursts, a cute surfer decal, and a post card!
(Posted on 3/17/2018) 2018-03-17
O'Neill Heat 5mm Round Toe Boots My Surf Boot of Choice for the Last 12 YearsReview by Josh Gizdavich, Owner of Cleanline Surf Josh Gizdavich, Owner of Cleanline Surf
My surf boot of choice for the last ten years has been the O'Neill round toe Heat. It fits like a glove and is more like a slipper than a heavy bulky boot. It has toe and heel caps for durability and fluid taped seams to keep water out and give more strength and longevity to the seam. It has a firewall lining which makes it warmer and very easy to get on and off. I am so confident in this boot that I put 150 pairs into our rental fleet this year alone. I've worn a lot of boots but this is my personal favorite!
Josh Gizdavich
Cleanline Surf
(Posted on 11/10/2017) 2017-11-10
O'Neill Heat 5mm Round Toe Boots Toasty goodnessReview by Awesome boots Awesome boots
these are exactly what was needed for winter surfing in the Atlantic. You will love these boots-
(Posted on 1/5/2017) 2017-01-05
O'Neill Heat 5mm Round Toe Boots Redesign! Review by Mare Mare
Love the redesign of the round toe bootie. Even though I live close to surf shops, clean line surf has always carried these, while others do not .. and no one else writes a personal note or includes candy in my order! Great personal service.
(Posted on 11/17/2016) 2016-11-17

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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.

Click here for our full Return Policy

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