Speed & Control for Foil Racing
Maximum performance for ambitious foilers
The GS-F stands for uncompromising control and top speed in foil racing. Designed for riders who want to push their limits, it combines aerodynamic precision with outstanding stability. The 3D wingsleeve mast pocket and the pronounced foot area ensure early take-off and a smooth, consistent flight – perfect for speed slalom and racing.
Key Facts:
- High-aspect performance foil sail
- Designed for foil racing and speed slalom
- 3D wingsleeve for instant acceleration
- Early take-off thanks to pronounced foot and high profile stability
- High-aspect geometry with reduced top area for speed & control
- Autopilot feel in flight for full racing focus
- Two clew claws and tack strap for precise trim
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Benchmark in Speed Foiling
Foil windsurfing demands more than ever – and the GS-F delivers exactly that. In 4.5 and 5.6 m², it excels in strong wind and rough conditions, while the high-aspect geometry of the 6.7 and 7.8 m² sizes with reduced top area ensures added control and maximum speed.
Absolute Control – Autopilot in Flight
The specific outline, shorter boom length and fine-tuned mast curve guarantee a stable, predictable ride. Supported by numerous carbon tubes, the sail stays calm and efficient even in heavy gusts. Once in the air, the GS-F behaves almost like an autopilot – letting you fully focus on racing while the sail adapts seamlessly to changing conditions.
Power & Stability in Speed Slalom
With its closed leech, reduced luff curve and optimized twist, the GS-F delivers aggressive, direct power transfer and impressive top speed. The wider mast pocket adds balanced handling, ensuring stability and control even in the toughest conditions – without compromising performance.
GS-F 2026 – Your turbo boost for foil racing.
KEY FEATURES
1. TACK STRAP
The integrated tackstrap ensures improved downhaul tension and maximises profile efficiency for a stable and controlled flight.
2. OFFSET CLEW CLAWS
Two offset claws for individual adjustment and perfect control in any wind strength. Ideal in combination with a trim system.
3. KEVLAR STRETCH CONTROL
Through the specific use of Kevlar Warp Laminate, we can precisely determine the stretch properties of each sail, ensuring a consistent profile and greater responsiveness.
4. ZIPPER OPENING
The zip openings allow you to easily access the camber and roll it gently during assembly.
5. ROLL CAMS
Four smooth-gliding roll cams for optimal profile stability and effortless rotation—ready for maximum speed and control.
6. 3D WING SLEEVE
The aerodynamically precise mast sleeve for maximum dimensional stability and outstanding performance at high speeds.
TECH SPECS
| Size m² |
Boom cm |
Luff cm |
Battens/ Tubes |
Cam | Top | IMCS | Best Mast | Mast cm / Ø |
Weight Kg |
| 4.5 | 166 | 403 | 7/7 | 4 | fix | 16-20 | Select | 370/400 RDM | 4.57 |
| 5.6 | 178 | 442 | 7/7 | 4 | fix | 20-22 | Select | 430 RDM | 5.06 |
| 6.7 | 189 | 489 | 7/7 | 4 | fix | 24-26 | Select | 460 SDM | 5.71 |
| 7.8 | 205 | 518 | 7/7 | 4 | fix | 28-30 | Select | 490 SDM | 6.30 |
| 8.4 | 213 | 541 | 7/7 | 4 | fix | 30-34 | Select | 520 SDM | 6.46 |
TECHNOLOGY
F.R.E.D.
F.R.E.D. will help you to find the optimal downhaul trim for your sail. The mark is located in the upper sail window. Simply trim the downhaul rope until the loose leech reaches the FRED mark.
TOP GUARD
The large reinforcement at the sail top avoids abrasion and wearing out whilst rigging.
VARIO TOP
With some sails a Vario Top is used, which also allows the use of a longer mast. An additional loop is sewn on top of each sail. It serves to hook in the sail if you want to pull out the mast.
MINI BATTENS
Lightweight mini battens take control of the leech while twisting and avoid detrimental leech flutter. By that, the window fabrics are prevented from damage and the longevity of the sail is increased.
BATTEN GUARD
PVC logo labels on the batten pockets prevent wearing out and abrasion whilst rigging.
INTERNAL TRIM BATTEN
The Internal Trim Batten system is completely integrated into the batten pocket. The battens can stay tensioned in the sail. The fine adjustment ensures an optimal trim. The profiled end piece offers additional protection against abrasion. An Allen key to tension comes with each sail.
BOOM POSITION CONTROL
The printed height scale at the boom opening helps you to easily remember your personal boom position.
SLEEVE VOLUMER
The sewn PVC label keeps the mast sleeve open at the boom opening like a clasp making it easier to insert the mast.
DOUBLE LOCK SEAMS
Double seams form the most stable connection between individual panels and different materials. They are used in stress zones as well as in areas of high tension and make your sail robust and durable.
MAST FOOT PROTECTOR
The new mast foot protector offers more protection for mast and board. The loop makes it easier to pull down the sail.Through an opening, the uphaul can be conveniently guided inside the protector. There is a mesh pocket on the inside. Excess rope etc. can be stowed here.
COMFORT PULLEY
The integrated triple pulley has large easy turning stainless brass rolls which greatly reduce the effort required for sail trimming.
TRIM SETTING
The luff length is patched on the mast protector. The boom length is also printed beside the clew.
POCKET GUARD
A PVC braid sewn onto the bottom batten pocket protects the sail from abrasion when waterstarting.
STRAP ON
After rolling up the sail, simply attach the bungee rope and the sail can be stowed away easier and is more space-saving.
FOOT GUARD
All seams in the significantly stressed foot area are protected by Dacron coverings. A PVC edging at the sail foot protects the leech edge against your board’s nonslip coating.
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