Description
The ION Radium is ION's best-selling windsurf waist harness, for those looking for top-level performance and comfort. With the new Spectre Bar 2 it spreads the load very well and gives precise control, and its hybrid shell combines rigid parts and soft materials to balance support and freedom. Used by Víctor Fernández.
Who it's for
- Intermediate and advanced windsurfers who sail a lot.
- Speed, wave and freeride riders looking for lumbar support.
- Anyone who wants a versatile, high-end windsurf waist harness.
Features
- Spectre flaps: tough TPE plastic flaps, easy to remove and fit, that stop the spreader bar from rotating upwards; they add stability and improve response.
- Curv back reinforcement: 3D-moulded Curv reinforcement for extra, ergonomic lumbar support.
- PVC buckles: standard buckles to adjust the harness easily.
- HD_Foam: stretchy foam that gives a comfortable fit without absorbing water.
- Internal Flex_Belt: flexible inner closure belt that ensures a snug fit and adapts to each rider's anatomy.
- Construction: Curv hybrid shell.
- Stiffness: medium.
- Profile: high.
- Bar and hook: includes the Spectre Bar 2 with windsurf hook.
- Composition: 30 % EVA, 25 % neoprene, 20 % PVC foam, 10 % polyester, 10 % polyamide, 5 % polypropylene.
Colour
Available in store in 900 black.
Which size to choose
| Size | EU size | Waist (cm) |
|---|---|---|
| S | 48 | 74-86 |
| M | 50 | 84-96 |
| L | 52 | 94-106 |
| XL | 54 | 104-116 |
Official ION chart. Measure your waist at the height where you will wear the harness, ideally with your wetsuit on. If you are between two sizes, the smaller one holds better and rides up less; the larger one leaves room for thick wetsuits. Check the selector for the sizes available in store. You'll find more tips in our harness size guide.
Frequently asked questions
Does it come with a spreader bar?
Yes. It comes with the spreader bar and windsurf hook fitted, ready to sail.
Radium or Icon Curv?
The Radium has medium stiffness and is very versatile. The ION Icon Curv 2026 has a rigid CURV® shell and tall sizes, for those seeking maximum support.
How do I get the size right?
Measure your waist and find your measurement in the chart above. The harness should feel firm without squeezing your abdomen; with use the foam adapts slightly to your body.
Payments and security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.