Weed Slasher G10 21 cm Power Box
Cut Through Weeds. Keep the Ride Alive.
No more frustrating weed snags mid-session. The Anti-Weed G10 Fin lets you sail fast and free, even in tricky conditions. Its angled profile slices through vegetation while keeping the control and feel of a standard fin—so you stay in flow, not in the weeds.
Ideal for bump & jump, freeride, and coastal sessions where floating weed patches can ruin the fun.
Why choose the Anti-Weed G10?
✔ Weed-Slicing Profile – Glides clean through thick weed zones
✔ Enhanced Thickness – Matches the lift and drive of standard freeride fins
✔ Forward Blade Position – Keeps your ride responsive and playful
✔ Impact-Ready G10 – Durable enough for rocky, shallow spots
✔ Multiple Box Options – Power and US Box fit most fin setups
SPECIFICATIONS
| Size (cm) | Fin Area (cm²) | Weight - Power Box | Weight - US Box |
|---|---|---|---|
| 21 | 233 | 0.468 kg | 0.408 kg |
| 23 | 277 | 0.523 kg | 0.478 kg |
| 25 | 327 | 0.578 kg | 0.549 kg |
| 27 | 373 | 0.633 kg | 0.619 kg |
Includes a protective fin cover.
The sweet spot for:
- Riders tackling weedy lakes, bays, and summer growth
- Freeride sailors who want a natural feel in unnatural conditions
- Bump & jump fans needing a no-drag, no-snag fin
No More Snags. All the Control.
Anti-Weed G10 – because the best sessions shouldn’t be cut short by weeds.
Windsurf Fins Knowledge
Ask the Windsurf Expert
Fins Fundamentals
What causes spin-outs and how can they be prevented ?
A spin-out occurs when the water flow along the fin breaks off, causing the board to slide sideways or at an angle to your sailing direction. This happens when the sideways force from the sail through your body to the fin becomes too great.
To prevent spin-outs: choose the right fin length and angle for your sail size, and manage back foot pressure.
To recover: shift weight to the mastfoot while realigning the back foot with your direction of movement.
Why do some fins perform better upwind than others?
Upwind performance in fins is determined by three main factors:
- Surface area: Larger fins provide more lift and better upwind capability
- Rake angle: More upright fins (less rake) generally perform better upwind
- Profile shape: Fins with efficient foil sections create more lift with less drag
The balance between these factors determines how well a fin will perform when sailing upwind.
A spin-out occurs when the water flow along the fin breaks off, causing the board to slide sideways or at an angle to your sailing direction. This happens when the sideways force from the sail through your body to the fin becomes too great.
To prevent spin-outs: choose the right fin length and angle for your sail size, and manage back foot pressure.
To recover: shift weight to the mastfoot while realigning the back foot with your direction of movement.
Upwind performance in fins is determined by three main factors:
- Surface area: Larger fins provide more lift and better upwind capability
- Rake angle: More upright fins (less rake) generally perform better upwind
- Profile shape: Fins with efficient foil sections create more lift with less drag
The balance between these factors determines how well a fin will perform when sailing upwind.
Fins Selector
Weed Slasher
A forgiving rake for easy sliding and slashing through weedy patches. The Weed Slasher offers great control and performance and all while keeping the budget-conscious weekend warrior in mind.
Anti-Weed Lessacher Weed Blade
Our newest weapon to dodge the "evil green". We again teamed-up with ‘Mr. Weed-Slasher’ - Wolfgang Lessacher - and created a lethal anti-weed line for spots infested with weed.
Freeride G10
A wide chord for straight-line stability and smart curve for jibes and turns.
G10 softer handling characteristics mean you benefit from the perfect balance of rigidity and forgiveness.
Wave G10
Your 4WD go-anywhere wave fin. A sideshore profile with stiffer twist and flex for higher lift and good onshore behavior too.
With G10 construction in all sizes, everything but your wallet takes a knock.
Bump & Jump
A forgiving rake for easy sliding and slashing through weedy patches. The Weed Slasher offers great control and performance and all while keeping the budget-conscious weekend warrior in mind.
Freestyle Pro
The G10 construction increases both performance and strength.
Happy at high speeds, with an amazing amount of pop, this model offers great grip for new-skool power moves and easily bounces into doubles.
Unifiber Fins: Engineered for Reliability
Built to Last
We build fins you can count on, day after day. No complicated choices or technical confusion - just dependable gear that lets you focus on enjoying your time on the water.
Tested and trusted by windsurfers like you, our fins deliver the stability and control you want, without the fuss.
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