Accessories designed for you
Get easier take-offs while keeping a natural foil feel. The Duotone Foil Assist Mast D/LAB Set provides 33 kg of electric thrust, a remote worn on your index finger, and an ergonomic battery harness for longer sessions and more control. Ideal for foil assist, prone, surf foil, and downwinds.
KEY INFORMATION
Duotone Foil Assist Mast D/LAB Set 2026: electric foil assist, 84 cm HM carbon mast
What we like
- Easier Take-offs: 33 kg of electric thrust helps you get on foil quickly and smoothly.
- Natural Ride Feel Preserved: The harness-mounted batteries keep your board light for a natural glide.
- Intuitive Control: An index-finger watch-ring remote lets you adjust speed without letting go of the pad or the foil.
- Versatility: Suited for prone, surf foil, SUP foil, and downwind riding.
- Safety: A double-press start function and automatic motor cut-off on release give you confidence.
- Minimal Drag: Features a slim profile, integrated motor, and a foldable two-blade propeller.
Available sizes
Disciplines
Level
Included
✓ Included: eMast D/LAB mast with integrated motor.
✓ Included: Duotone eRemote Watch Ring Set.
✓ Included: Duotone eHarness Set with battery box.
✓ Included: 2 x 7A batteries.
✓ Included: Duotone Battery Charger Set and connection cable.
✓ Included: Ring pads, XL wristband, protective bag.
✗ Not included: Front wing, stabilizer, fuselage, top plate.
The D/LAB mast is compatible with Duotone and Armstrong foils only. It mounts directly onto a Duotone foil, but requires the Armstrong E-fuselage (available as an accessory) for an Armstrong foil.
DETAILED DESCRIPTION
Powerful Assistance for Easier Take-offs
The eMast D/LAB provides 33 kg of thrust from an integrated motor, making take-offs significantly easier. You'll feel the boost mainly during the kick-out, which lets you use smaller foils and link sections more easily when prone or downwind riding without getting exhausted.
Natural Ride Feel Preserved by the Battery Harness
The eHarness places the batteries around your waist to keep the board light and maintain a natural feel. You get a fluid, responsive surf-foil experience with instant acceleration on tap when you need it, which is especially useful for prone and SUP foil.
Simple, Secure Control with the Watch-Ring Remote
The remote, worn on your index finger, lets you adjust the power without letting go of the board or wing. A double-click prevents accidental starts, and releasing it instantly cuts the motor, giving you peace of mind when you wipe out.
Optimized for Performance and Compatibility
The mast's slim profile and the foldable two-blade propeller minimize drag for a better glide and smooth transitions. This modular system is built for versatility: it mounts on standard US rails and is fully compatible with Duotone and Armstrong foils via its 3BS connection.
Customizable Assistance
You can choose between different propellers (plastic or aluminum) and boost modes to fine-tune responsiveness and power. Two control modes, Standard and Boost, offer different speed ranges to suit your style and the conditions.
Convenience and Ride Time
The set includes a charger that can recharge both batteries in under an hour and has a discharge function to preserve their lifespan. Ride time is typically between 30 and 60 minutes, depending on use and conditions.
SIZE GUIDE
| eHarness Size | Waist Size | EAN |
|---|---|---|
| S-M | 71 to 89 cm | 9010583280370 |
| L-XXL | 89 to 114 cm | 9010583280387 |
Sizing only applies to the battery harness: the mast, remote, batteries, and charger are the same for both options.
TECHNICAL SPECIFICATIONS
| Specifications | |
|---|---|
| Product | Duotone Electric - Foil Assist Set D/LAB |
| Brand | Duotone Electric |
| Disciplines | Foil assist, prone, surf foil, downwind, SUP foil |
| Construction | HM Prepreg Carbon (High Modulus Carbon) |
| Electric Thrust | 33 kg |
| Mast length | 84 cm |
| Chord | 110 mm |
| Thickness (thinnest point) | 14.5 mm |
| Weight (mast set) | 3 kg (tolerance ±5%) |
| Base/mast connection | 3BS (molded) |
| Recommended fasteners | 3x M8x50 TX45, torque 15 Nm |
| Motor | Integrated, positioned 17 cm under the top plate, internal cables |
| Propeller | Two-blade, foldable, plastic or aluminum options |
| Signal Transmission | Bluetooth receiver integrated into the battery box |
| Remote | eRemote Watch Ring, worn on the index finger, double-press safety |
| Batteries | 2 x 7A batteries included, worn in the harness |
| Ride Time | Approx. 30 to 60 minutes depending on use, setup, and conditions |
| Recharge | Both batteries in under an hour, storage discharge function |
| Fuselage Compatibility | D/LAB Wings + Tail / Aero AL 3BS / Fanatic & Duotone Carbon |
| Front Wing recommendation | 900 cm² minimum |
| Board recommendation | 35 L minimum |
| Season | SS26 |
| Year | 2026 |
| Product Code | 40260-4003 |
VIDEOS
FAQ
Who is the Duotone Foil Assist Mast D/LAB Set for?
This set is for intermediate to advanced riders who want easier take-offs while keeping a natural foil feel. It's ideal for prone, surf foil, SUP foil, and downwind sessions when you're looking for more ride time and control.
What exactly is included in the set?
The set includes the eMast D/LAB with its integrated motor, the eHarness with its battery box (choose S-M or L-XXL), two 7A batteries, the Battery Charger Set with connection cable, and the eRemote Watch Ring. The front wing, stabilizer, fuselage, and top plate are not included.
What are the features of the eMast D/LAB mast?
It's an 84 cm HM Prepreg Carbon mast with an integrated motor that provides 33 kg of thrust. It has a 110 mm chord, a minimum thickness of 14.5 mm, and weighs 3 kg. The mast also features a molded 3BS connection, a slim profile, and a two-blade folding propeller.
Which harness size should I choose?
The S-M size is for waist measurements of 71 to 89 cm, while the L-XXL size is for 89 to 114 cm. The harness is the only part of the set that is sized, the rest of the kit is identical.
What front wing and board should I pair it with?
For the best battery performance and efficient take-offs, Duotone recommends a front wing of at least 900 cm² and a board with at least 35 L of volume. The mast mounts on standard US rails and is compatible with Duotone and Armstrong foils via the 3BS connection.
What ride time can I expect?
You can expect a ride time of 30 to 60 minutes, depending on your use, setup, and the conditions. The charger can fully recharge both batteries in under an hour and includes a discharge function to preserve their lifespan.
How do I look after my foil assist?
Rinse it with fresh water after each session. Make sure the remote and battery box are completely dry before storing them. Recharge the batteries regularly, and use the discharge function for long periods without riding. Check that the propeller and connections are in good condition before every session.
Why buy from GlissEvolution?
GlissEvolution has over 20 years of expertise in watersports. Our team of passionate riders tests all our gear at the local spots of La Baule and Pornichet. We offer a responsive, France-based after-sales team, a 2-year warranty, free shipping on orders over €150, and you can pick up your order at our shop in Pornichet.
▶ Need some advice?
GlissEvolution, 2c avenue du Gulfstream, 44380 Pornichet (Loire-Atlantique)
09 62 64 74 77 | WhatsApp: 07 83 28 39 94, Tuesday to Saturday, 10 am-1 pm / 3 pm-7 pm
Test center available by appointment
