Speed and Control for Experienced Foilers
The GS-F enters the next stage and sets a new benchmark in foil racing. Designed for ambitious foilers, this sail focuses on uncompromising control and neutrality at maximum speed. Its aerodynamically precise 3D wingsleeve mast pocket and pronounced foot area deliver early take-off and smooth flight—perfect for speed slalom competition.
KEY FACTS:
- High-Aspect Performance Foil Sail
- Developed for foil racing and foil slalom
- 3D Wingsleeve for instant acceleration
- Early Take-Off: Quick acceleration through a pronounced foot and high shape stability for extreme conditions
- Optimized Power and Control: Improved aspect ratio and reduced top area for increased speed and control in flight
- Autopilot feel in flight: Perfect balance allows you to focus entirely on racing without unnecessary corrections
- Two clew claws for optimized boom height adjustment, tack strap for improved foot tension
▶Engineered for the New Challenges of Speed Foiling
Foil windsurfing has evolved rapidly, and the GS-F is ready for the demanding discipline of speed foiling in high winds. With sizes 4.5 and 5.6 m², the GS-F is designed for these extreme conditions. The revised aspect ratio of the 6.7 and 7.8 m² sizes, along with a 15% reduction in top area, provide added control and maximum speed.
Absolute Control and Autopilot Feel
The redesigned mast curve, combined with the specific outline and shorter boom length, delivers a stable and predictable riding experience, particularly in flight. High shape stability is supported by an increased number of carbon tubes, ensuring the sail remains calm and efficient, even in strong winds. Once airborne, the GS-F acts almost like an autopilot—allowing the rider to fully focus on the race while the sail seamlessly adapts to changing conditions.
Power and Stability for Speed Slalom
The GS-F is crafted for the ambitious foil racer. Its closed leech and reduced luff curve allow for efficient wind flow through the profile, delivering direct, aggressive power. The reduced twist enhances high-speed performance, while the wider mast pocket ensures balanced handling. Even in the most challenging conditions, the GS-F remains stable and easy to control without sacrificing performance.
GS-F – Your Turbo Boost for Foil Racing.
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 |
KEY FEATURES
1. TACK STRAP
Provides improved downhaul tension and maximises profile efficiency for a stable and controlled flight.
2. 3D WING SLEEVE
Aerodynamically optimised mast pocket for maximum shape stability, fast acceleration and efficient power transmission when foiling.
3. NEOPRENE COVER
The boom cut-out is closed by a neoprene cover. This reduces wind incidence and water ingress into the mast pocket and improves aerodynamics.
4. ZIPPER OPENING
The zip openings allow you to easily access the camber and roll it gently during setup.
5. CLEW CLAWS
Two offset claws for customised adjustment and perfect control in any wind strength. Ideal in combination with a trim system.
6. FOIL SHAPE
The special foil outline ensures optimum stability and efficient planing - perfectly tuned for effortless foiling.
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.
IN ACTION
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