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2026: O'Neill
SKU:
5376

Hyperfreak Fire 6/5/4mm Split Toe Wetsuit Boots

£74.95
£0.00 £74.95
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SeIect Size: UK5 (US6)
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The O’Neill Hyperfreak Fire 6/5/4mm Split Toe Wetsuit Booties —a premium choice for surfers, windsurfers, kitesurfers and paddlers who won’t let winter conditions cut the day short. Built from O’Neill’s cold-water R&D program, these high-performance neoprene booties are designed to keep you warm, supported and locked-in when the temperature drops and the swell stays good.

FULL DESCRIPTION 

The O’Neill Hyperfreak Fire 6/5/4mm Split Toe Wetsuit Booties —a premium choice for surfers, windsurfers, kitesurfers and paddlers who won’t let winter conditions cut the day short. Built from O’Neill’s cold-water R&D program, these high-performance neoprene booties are designed to keep you warm, supported and locked-in when the temperature drops and the swell stays good.

The 6/5/4mm split-toe design balances heat retention with board feel, giving you added control and stability through turns, tacks and quick foot adjustments. A full wrap under-and-around foxing boosts arch support and delivers reliable lateral lockdown, helping reduce foot fatigue during longer sessions. With full inner and outer toe coverage, you get enhanced durability in high-wear areas plus improved grip during manoeuvres.

Engineered for warmth and comfort, O’Neill uses TB4 Firewall (recycled material) through the interior sole and top of foot, alongside TB4x (recycled) in the upper/shin for a snug, heat-trapping fit. Krypto Armor (recycled) reinforces the exterior top foot for added protection, while the UltraFlex exterior sole and upper/shin keep these booties flexible without sacrificing strength. Finished with glued and blind-stitched seams and interior recycled TB3X tape, they’re built to reduce water ingress and stay dependable session after session.

If you’re searching for warm 6mm split-toe wetsuit boots, winter surf booties, or cold-water neoprene booties that combine insulation, support and grip, the O’Neill Hyperfreak Fire 6/5/4mm Booties are a standout option for harsh conditions and high-performance riding.

KEY FEATURES

  • FULL WRAP UNDER & AROUND FOXING FOR
  • ARCH SUPPORT AND LATERAL (SIDE-TO-SIDE) LOCKDOWN
  • FULL INNER AND OUTER TOE COVERAGE FOR DURABILITY & INCREASES GRIP DURING MANEUVERS
  • GLUED & BLIND-STITCHED
  • INTERIOR RECYCLED TB3X TAPE
  • TB4 FIREWALL (RECYCLED MATERIAL) - INTERIOR SOLE, INTERIOR TOP FOOT
  • TB4x (RECYCLED MATERIAL) - INTERIOR UPPER/SHIN
  • KRYPTO ARMOR (RECYCLED MATERIAL) - EXTERIOR TOP FOOT
  • ULTRAFLEX - EXTERIOR SOLE, EXTERIOR UPPER/SHIN

CONSTRUCTION

Exterior: TechnoButter 4

Interior: TechnoButter Firewall

Interior: TB3X Taped Seams

Exterior: Fluid Seam Weld
PRODUCT INFORMATION

The O’Neill Hyperfreak Fire 6/5/4mm Split Toe Wetsuit Booties —a premium choice for surfers, windsurfers, kitesurfers and paddlers who won’t let winter conditions cut the day short. Built from O’Neill’s cold-water R&D program, these high-performance neoprene booties are designed to keep you warm, supported and locked-in when the temperature drops and the swell stays good.

FULL DESCRIPTION 

The O’Neill Hyperfreak Fire 6/5/4mm Split Toe Wetsuit Booties —a premium choice for surfers, windsurfers, kitesurfers and paddlers who won’t let winter conditions cut the day short. Built from O’Neill’s cold-water R&D program, these high-performance neoprene booties are designed to keep you warm, supported and locked-in when the temperature drops and the swell stays good.

The 6/5/4mm split-toe design balances heat retention with board feel, giving you added control and stability through turns, tacks and quick foot adjustments. A full wrap under-and-around foxing boosts arch support and delivers reliable lateral lockdown, helping reduce foot fatigue during longer sessions. With full inner and outer toe coverage, you get enhanced durability in high-wear areas plus improved grip during manoeuvres.

Engineered for warmth and comfort, O’Neill uses TB4 Firewall (recycled material) through the interior sole and top of foot, alongside TB4x (recycled) in the upper/shin for a snug, heat-trapping fit. Krypto Armor (recycled) reinforces the exterior top foot for added protection, while the UltraFlex exterior sole and upper/shin keep these booties flexible without sacrificing strength. Finished with glued and blind-stitched seams and interior recycled TB3X tape, they’re built to reduce water ingress and stay dependable session after session.

If you’re searching for warm 6mm split-toe wetsuit boots, winter surf booties, or cold-water neoprene booties that combine insulation, support and grip, the O’Neill Hyperfreak Fire 6/5/4mm Booties are a standout option for harsh conditions and high-performance riding.

KEY FEATURES
  • FULL WRAP UNDER & AROUND FOXING FOR
  • ARCH SUPPORT AND LATERAL (SIDE-TO-SIDE) LOCKDOWN
  • FULL INNER AND OUTER TOE COVERAGE FOR DURABILITY & INCREASES GRIP DURING MANEUVERS
  • GLUED & BLIND-STITCHED
  • INTERIOR RECYCLED TB3X TAPE
  • TB4 FIREWALL (RECYCLED MATERIAL) - INTERIOR SOLE, INTERIOR TOP FOOT
  • TB4x (RECYCLED MATERIAL) - INTERIOR UPPER/SHIN
  • KRYPTO ARMOR (RECYCLED MATERIAL) - EXTERIOR TOP FOOT
  • ULTRAFLEX - EXTERIOR SOLE, EXTERIOR UPPER/SHIN
CONSTRUCTION

Exterior: TechnoButter 4

Interior: TechnoButter Firewall

Interior: TB3X Taped Seams

Exterior: Fluid Seam Weld

DELIVERY INFORMATION

United Kingdom

Free delivery on orders over £99, except for bulky items and UK remote postcodes.

Orders under £99 will be charged £4.99.

Northern Ireland, the Scottish Highlands, and the Channel Islands are now part of our "Rest of the World" shipping terms due to high delivery costs.

Europe
Free delivery on orders over £200, except for bulky items.

Orders under £200 will be charged £30, plus there may also be an extra charge for bulky items.

Rest of World
Free delivery on orders over £500, except for bulky items.

Orders under £500 will be charged £60, plus there may also be an extra charge for bulky items.

Please Note:
We will contact you with any extra delivery costs before processing the order to ensure you are happy to proceed.

For all international orders, the customer is responsible for any extra costs, such as customs, duties, storage fees, etc.

For full delivery detail click here >
£74.95
£0.00 £74.95

Let customers speak for us

from 132 reviews

Nice to not have to rinse the charging pins on the woo after every session ;)

Renato
Woo 4.0

great communication and delivered the product when they said. Would definitely use again!

Chris Hover
H20 Sports
Wing Foiling Gear

I cannot sing enough praises for H2O Sports! I have over the years made small purchases because they’ve been the most competitive online but recently I bought some new wing foiling kit and there was some slight damage to the alloy mast - well H2O’s aftercare was second to none!! They were instantly chasing down a replacement part and happy for me to be using the old part (albeit a bit bent) whilst waiting for the replacement. So refreshing to experience such great customer service.
Many many Thanks! - will be ordering more and more from this company!!!

Mike
H20 Sports

Great buying experience. Great prices and delivered quickly. Thanks Guys.

Andy PG
H20 Sports
Duotone Unit SLS 2025

After purchasing this wing earlier this year it has noticeably made tacks so much smoother and overall upgraded my riding. I bought the 3.0 and 5.0 metre and my 3.0m flies very well in both underpowered and overpowered conditions

Emma
Unit SLS Concept Blue Wing
Duotone Carve DLAB and Unit SLS wing

I purchased the Unit SLS 2025 wing earlier this year and it has made tacks so much smoother and upgraded my riding. I also bought the Duotone Carve 3.0 D/LAB 2025 with the 800 front wing and once again it’s been a game changer, having a great amount of glide which works perfectly for both wingfoiling and kitefoiling!
All thanks to the H2O team that always have loads of knowledge, passion for watersports and go above and beyond!

Emma
H20 Sports

Preferring not to throw away my (now discontinued) North Red boom which had a broken cuff, I called H2O to see if there was any way to salvage it. I spoke with Matt who was very knowledgeable and helpful but came off the phone somewhat resigned that I might not be able to get the part. However to my surprise a little while later I was blown away (with a force 5) when I got a call to tell me he’d sourced one for me. And here I am now, a week on, with all the bits I need to get back on the water; whoever said people don’t have time to help others! So the moral of this story is have a little faith and try H2O!

Davalar Kinsey
H20 Sports
5* Service - Putting customers first 5*

Preferring not to throw away my (now discontinued) North Red boom which had a broken cuff, I called H2O to see if there was any way to salvage it. I spoke with Matt who was very knowledgeable and helpful but came off the phone somewhat resigned that I might not be able to get the part. However to my surprise a little while later I was blown away (with a force 5) when I got a call to tell me he’d sourced one for me. And here I am now, a week on, with all the bits I need to get back on the water; whoever said people don’t have time to help others! So the moral of this story is have a little faith and try H2O!

Davalar
H20 Sports
Light wind lift

Ordered a 1350 Glide 2.0 to progress on to from my 1750 aero free. Being a heavier rider I've found it's now my go to foil wing, initially a bit harder to get on the foil compared to the aero free but once up it feels completely effort less! Thanks to the team for getting me sorted out 🤙

Kyle Gould
Glide 2.0 SLS Wing Set
The best in the business.......

James, Matt and the H20 Team are absolute gurus of the water sports industry, friendly, helpful and knowledgable. They will always give the right advice and come up with superb deals and first class support, thanks guys for always helping me to make the right decisions over the last 20 + years!

Tim H
H20 Sports
Duotone slim 2.0 Dlab 2.0 carbon mast

My new mast arrived from H20. Sports and it was so worth the wait. You immediately notice how much stiffer it is compared to the v1 carbon version when riding. The foil feels more responsive and direct .It also glides longer in transition s and riding bumps.
Its well worth the upgrade in my opinion.

Tim
Foil Mast Slim 2.0 D/LAB
Duotone Float 5 m is a summer light wind weapon

I bpught this wing to replacr my Unit 5.5 m wing for tje summer breezes as i never liked using big wings. This wing is really powerful in the low end and allows you to pump really efficiently to get on foil with a bit of technique.
You can size down by half a metre with this wing compared to a Unit.
Its still fast and so good iwhen you roll into a tack.
Perfect quiver would be a 3 m , 4m & a 5 m in the Float for all conditions.
Its a great price too as lower than Dlab and SLS wings but with great performance.

Tim
Float Wing
Duotone sky surf/sky style, Duotone unit, Dlab foil range.

As one of the H2O riders I have really enjoyed the variety of kit H2O have available. Including the Duotone sky surf 35Ltr which quickly become my favourite board because of its shorter and thicker shape while being low in litres it still allows me to get it out the water in some lighter winds. However it comes into its own when the wind is strong and the waves are pumping with its incredible manoeuvrability. Paired with the Duotone units (that are light weight and precisely balanced) wave riding is a dream.

Ted Lockyer
H20 Sports
New to downwind boards and loving it!

I've been one of those riders who thought one board was enough. Turns out a downwind board has opened up so many more days on the water. I cant believe how easy this beast gets going in 6 knots. I use my 8' board with the 1100 and 1595 Duotone Glide. It's like a whole new sport. Whilst I've tried paddling up, I think I'll stick to winging for now (although can't wait to try the Stash Parawing).

Graham Lockyer
Downwinder SLS Wing Board
Enhanced low-end power, stability, and maneuverability at a great price

Lots of the benefits of the DLAB Unit but without the price tag. Strong, light, and powerful. It's been great in all conditions, handles really well when over powered. I bought the 3.5, 4.5 and 5.5 to cover all eventualities. Personally I prefer the handle option which works really well with my harness. Matt and the team really helpful in deciding on the sizing.

Graham Lockyer
Unit SLS Concept Blue Wing