2026 Duotone Foiling & Electric Foil Assist Set AL
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PRONE SURF / DOWNWIND
Duotone FOIL ASSIST SET AL 2026
Item-no. 40260-4001 · Sizes: S-M, L-XXL · Colors: C99 Random
Take your foiling to the next level with the Foil Assist Set AL – a plug-and-play system that gives you the extra boost exactly when you need it.
The Foil Assist Set AL includes the following items:
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eMast AL Set
Built from lightweight aluminum and measuring 84 cm, the eMast AL is incredibly stiff and provides a direct feel.
The motor pod is fully integrated into the mast and positioned slightly behind the leading edge, 17 cm below the top plate, to minimize drag even during touchdowns. It features a two-blade folding propeller that reduces drag for effortless glide on the wave. Thanks to the integrated gear system, the propeller unfolds instantly, providing a smooth transition as you kick out of the wave and power back out.
The eMast mounts to your board just like a conventional foil mast.
Note: A fuselage adapter is required to mount a fuselage onto the eMast. In addition to the Duotone adapter, we offer ten other options to help you combine the Foil Assist with your existing foil setup. The adapter is not included and must be purchased separately.
Tip: For optimal battery performance, pair the eMast with a front wing of at least 900 cm² and a board with a minimum volume of 35 L.
eHarness Set
The Foil Assist is powered by two compact batteries housed in a waterproof box mounted on a lightweight eHarness (approx. 3.76 kg). This keeps your board free from extra weight and drag. With the batteries placed on your hips, the natural, fluid feel of foiling is preserved while still giving you full freedom of movement. The eHarness is buoyant and easy to remove. A cable runs neatly along the shorter board leash and connects the batteries to the eMast. The receiver integrated into the battery box ensures a stable and reliable connection between the remote and the motor throughout your entire session.
eRemote Watch Ring Set
The Foil Assist Remote - a waterproof smartwatch-style controller with a finger ring - keeps your hands free, making it easier to push up on the board, paddle, duck dive, carve or handle a wing. Activate the motor with a double-click on the + button, and control the speed by pressing and holding either the + or - button.
Battery Charger Set
The charger can fully charge both batteries in under one hour and also includes a discharge function that helps maintain long-term battery health.
Airtravel-friendly Battery Set
Depending on your skill level, weight, setup and the conditions, the Foil Assist batteries provide 25 to 40 minutes of runtime per charge.
Note: Find out more details about each product by clicking on the related products below.
Tech Features
Stiff mast for a direct response
The stiff aluminum mast features a rigid, surf-inspired profile that ensures precise control and instant responsiveness, minimizing drag for smoother and more efficient sessions.
Highly modular
Every component of the Foil Assist system is cross-compatible with the other eMast options, making it easy to expand your setup. The Foil Assist Mast AL can be mounted to any brand’s foilboard with standard US foil tracks.
Low drag through seamless integration
The motor pod is fully integrated into the mast and positioned slightly behind the leading edge, 17 cm below the top plate, to minimize drag even during touchdowns. This design also makes assembling the mast easier.
Reliable signal transmission
The wireless connection between the remote and the Foil Assist system is very stable, as the receiver is integrated into the lid of the battery box. This design prevents the connection from being interrupted by water.
Different boost options
Customize your ride with different propellers — plastic or aluminum — to dial in your perfect setup. Choose between powerful assistance that enables you to ride smaller foils and perform sharper turns, or go for a smoother boost for easy takeoffs and foiling.
Folding propeller for low drag
The two-blade folding propeller reduces drag, allowing for effortless gliding on the wave. Thanks to its integrated gear system, the propeller unfolds instantly, providing a smooth transition as you kick out of the wave and power back out.
Sizes & Specs
Sizes & Specs
| Lenght (cm) | Chord (mm) | Thickness (Thinnest Point In mm) | Weight (kg / Tolerance: +/- 5% Possible) | Screws 3bs | Rec. Torque | Construction | Disciplines | Conditions | Character | Compatibility Fuselages |
|---|---|---|---|---|---|---|---|---|---|---|
| 84 | 120 | 18 | 3.45 | 3x M8X50 TX45 | 15NM M8 | Aluminum | Assisted Prone, Downwind, Wake, Wing Foil | Small to Medium size surf, DW conditions | Strong, easy, maneuverable, direct response | D/LAB Wings + Tail / Aero AL 3BS / Fanatic & Duotone Carbon |
Size Chart
| Size | Waist |
|---|---|
| S - M | 71 - 89 cm |
| L - XXL | 89 - 114 cm |
