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2025: ION
SKU:
48252-4742

Radium Windsurf Harness

£279.99
£0.00 £279.99
Tax included. Shipping calculated at checkout.
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Select Colour: 732 blue-nights
Select Size: 48/S
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The Radium is the ultimate choice for windsurfers who demand top-tier performance and comfort.

FULL DESCRIPTION

Now featuring the brand-new Spectre Bar 2, it provides exceptional load distribution and flexibility, ensuring superior control and responsiveness during high-performance sessions. Built with a hybrid shell construction, the Radium combines rigid hardshell elements with soft materials, offering the perfect blend of support and freedom of movement.

Chosen by professional windsurfers like Victor Fernandez, the Radium is the most popular harness in ION's windsurfing range, delivering pro-level precision and comfort for the most demanding riders. The soft neopren belt and light PVC buckles enable you to find the perfect fit. Whether you’re pushing your limits or seeking premium performance, the Radium is engineered for the ultimate windsurfing experience.

KEY FEATURES

Spectre flaps

Easily removable and attachable, crafted from durable TPE plastic to prevent the spreader bar from twisting upward. These flaps provide additional stability and enhance responsiveness, ensuring optimal performance during your sessions.

PVC Buckle

Standard PVC buckles for easy adjustments.

HD_Foam

Elastic foam for a comfortable fit without soaking up water.

Internal Flex_Belt

A flexible closing belt system on the inside guarantees a snug fit and adapts perfectly to the rider’s individual anatomy.
PRODUCT INFORMATION

The Radium is the ultimate choice for windsurfers who demand top-tier performance and comfort.

FULL DESCRIPTION

Now featuring the brand-new Spectre Bar 2, it provides exceptional load distribution and flexibility, ensuring superior control and responsiveness during high-performance sessions. Built with a hybrid shell construction, the Radium combines rigid hardshell elements with soft materials, offering the perfect blend of support and freedom of movement.

Chosen by professional windsurfers like Victor Fernandez, the Radium is the most popular harness in ION's windsurfing range, delivering pro-level precision and comfort for the most demanding riders. The soft neopren belt and light PVC buckles enable you to find the perfect fit. Whether you’re pushing your limits or seeking premium performance, the Radium is engineered for the ultimate windsurfing experience.

KEY FEATURES

Spectre flaps

Easily removable and attachable, crafted from durable TPE plastic to prevent the spreader bar from twisting upward. These flaps provide additional stability and enhance responsiveness, ensuring optimal performance during your sessions.

PVC Buckle

Standard PVC buckles for easy adjustments.

HD_Foam

Elastic foam for a comfortable fit without soaking up water.

Internal Flex_Belt

A flexible closing belt system on the inside guarantees a snug fit and adapts perfectly to the rider’s individual anatomy.

DELIVERY & RETURNS

Life is complicated enough, so we've made returning items as simple as possible for mainland UK. Head to your account and click the link for returning items and we'll take it from there. For exchanges, simply select "refund" and re-order the required item again. We'll refund the very moment it's returned to us.

For NI, Channel Islands, Europe and Rest of World, you the customer will need to return the item to us as collections are not possible.

For item's where we've made a mistake or the item is faulty - we'll refund all postage costs on receipt of postage receipt and dispatch replacements items FOC. For items simply no longer required or where you the customer has ordered the incorrect size or product, return postage will not be refunded and dispatching out will be chargeable.
ION Radium Windsurf Harness - Windsurf | H2O Sports
£279.99
£0.00 £279.99

Let customers speak for us

from 127 reviews
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
Great board for all conditions

I absolutely love my 65L/4'9" Sky Style SLS Wing Board. I'm about 88kg and it suits me for most conditions. Easy planing, great in waves, sold for jumping. Incredibly light, especially when paired with a DLAB Carve 800 foil and mast, which makes it a great overseas travel option too. Carbon finish and colours look great (picture on website doesn't do it enough justice). Not a big fan of the front foot straps overlapping but going to put the new v-strap on which will sort this.

Graham Lockyer
Sky Style SLS Wing Board
Great performance at an attractive price

I usually go for the DLAB or SLS Concept Blue Units but this wing has had great reviews so thought I'd give it a try. Great power delivery and handling, really light weight but solid construction. The wing’s dihedral and tension profile give amazing flight balance so although designed for wave/downwind, I think this wind would suit all levels. Bought teh 5m for the summer but bought a 4 ready for the winter swell.

Graham Lockyer
Float Wing
Duotone Unit SLS

The 2025 Unit is a good allrounder fast, stiff & light wing.
I prefer to size down my Unit as they are really grunty wings.
They also have great top end aswell and the white colourway looks cool.

Tim
Unit SLS Concept Blue Wing
Duotone Skybrid SLS

I have ridden the Skybrid SLS 70 litre and its a great hybrid board between a short wave freesyle board and a mid length shape.
Easy to get up though its narrower than my previous boards and does require a little more effort.
The big advantage is the early planing speed to get on foil and the glide.
Its a good allrounder in waves and flat water.

Tim
Skybrid SLS Wing Board

Customer Reviews

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