Complete your gear
Want to make your take-offs easier while keeping that natural foil feel? The Duotone Foil Assist Mast D/LAB Set delivers 33 kg of electric thrust, an index-finger remote, and an ergonomic harness-battery for longer sessions. It offers enhanced control. It's ideal for foil assist, prone, surf foil, and downwinds.
KEY INFORMATION
Duotone Foil Assist Mast D/LAB Set 2026: electric foil assist, HM carbon mast 84 cm
What we like
- Effortless Take-offs: 33 kg of electric thrust helps you get out of the water quickly and confidently.
- Natural Sensations Preserved: The harness-mounted batteries keep your board light for an authentic glide.
- Intuitive Control: An index-finger watch-ring remote lets you adjust speed without ever letting go of the pad or the foil.
- Versatility: Perfectly suited for prone, surf foil, SUP foil, and downwind use.
- Safety First: A double-press function for starting and automatic stop upon release provides peace of mind.
- Minimal Drag: It features a slim profile, integrated motor, and a foldable two-blade propeller.
Available sizes
Use
Level
Included
✓ Included: eMast D/LAB mast with integrated propeller.
✓ Included: Duotone eRemote Watch Ring Set remote.
✓ Included: Duotone eHarness Set harness with battery box.
✓ Included: 2 x 7A batteries.
✓ Included: Duotone Battery Charger Set and connection cable.
✓ Included: Ring cushions, XL wristband, protective bag.
✗ Not included: Front Wing, stabilizer, fuselage, board connection plate.
The D/LAB mast is designed for seamless integration with Duotone and Armstrong foils. It mounts directly onto a Duotone foil. For an Armstrong foil, you'll need the Armstrong E-fuselage, which is available as an accessory.
DETAILED DESCRIPTION
Powerful Assistance for Easier Take-offs
The eMast D/LAB mast delivers 33 kg of thrust via an integrated motor, making getting out of the water significantly more accessible. You'll feel the assistance mainly during the kick-out. This allows you to use smaller foils and link sections more easily in prone or downwind without overexerting yourself.
Preserved Riding Sensations Thanks to the Harness-Battery
The eHarness positions the batteries around your waist, lightening the board and maintaining a natural feel. You'll experience fluid and reactive surf-foiling. You will also benefit from instant acceleration when you need it most, which is particularly useful in prone and SUP foil.
Simple and Secure Control with the Watch-Ring Remote
The remote, worn on your index finger, allows you to adjust power without ever letting go of the board or the wing. A double-click prevents unintentional starts. Releasing it immediately cuts the motor, providing reassurance when you take a tumble.
Optimized Design for Peak Performance and Compatibility
The slim profile of the mast and the foldable two-blade propeller work together to minimize drag. This delivers a smoother glide and seamless transitions. This modular system is designed for versatility: it mounts effortlessly onto standard US rails. It is fully compatible with Duotone and Armstrong foils, thanks to its 3BS connection.
Tailor Your Ride: Adjustment Options for Customized Assistance
You can choose between different propellers (plastic or aluminum) and boost modes to adjust responsiveness and power. Two control modes (Standard and Boost) offer several speed ranges depending on your style and conditions.
Practicality and Range
The set includes a charger capable of recharging both batteries in less than an hour and a discharge function to preserve their lifespan. Range typically varies 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 |
The size is chosen based solely on the harness-battery: the mast, remote, batteries, and charger are identical in both configurations.
TECHNICAL SPECIFICATIONS
| Specifications | |
|---|---|
| Product | Duotone Electric - Foil Assist Set D/LAB |
| Brand | Duotone Electric |
| Use | 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 foldable blades, 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 |
| Battery | 2 x 7A batteries included, worn on the harness |
| Range | Approximately 30 to 60 minutes depending on use, setup, and conditions |
| Recharge | Both batteries in less than 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 |
| Duotone Electric reference | 40260-4003 |
VIDEOS
FAQ
Who is the Duotone Foil Assist Mast D/LAB Set for?
This set is designed for intermediate to advanced riders who want to make their take-offs easier while still enjoying a natural foil feel. It's perfect for prone, Surf foil, SUP foil, and downwind sessions when you're looking for extended range and enhanced control.
What exactly is included in the set?
The set includes the eMast D/LAB mast with its integrated motor, the eHarness with its battery case (choose between S-M or L-XXL), two 7A batteries, the Battery Charger Set with its connection cable, and the eRemote Watch Ring remote. Please note that the Front Wing, stabilizer, fuselage, and plate are not included.
What are the features of the eMast D/LAB mast?
This 84 cm HM Prepreg Carbon mast features an integrated motor that delivers 33 kg of thrust. It features a 110 mm chord, a minimum thickness of 14.5 mm, and a total weight of 3 kg. The mast is equipped with a molded 3BS connection, a slim profile, and a two-blade folding propeller.
What harness size should you choose?
The S-M size fits waist sizes from 71 to 89 cm, while the L-XXL size accommodates 89 to 114 cm. The harness is the only item in the set that comes in different sizes; all other accessories are identical.
What Front Wing and board should you pair it with?
For optimal battery performance and efficient take-off, Duotone recommends a Front Wing of at least 900 cm² and a board with a minimum volume of 35 L. The mast mounts on standard US rails. It is compatible with Duotone and Armstrong foils via the 3BS connection.
What range can you expect?
You can expect a range of 30 to 60 minutes, depending on your use, setup, and conditions. The charger can fully recharge both batteries in under an hour. It includes a discharge function to help preserve their lifespan.
How do you maintain your foil assist?
After each session, rinse your foil assist with fresh water. Make sure to completely dry the remote and battery case before storage. Recharge the batteries regularly, and use the discharge function for extended periods when you're not riding. Always check the propeller and connections for integrity before every outing.
Why buy from GlissEvolution?
GlissEvolution brings over 20 years of expertise in watersports. Our passionate advisors rigorously test all equipment at the prime spots of La Baule and Pornichet. We offer responsive after-sales support based in France, a 2-year warranty, free shipping on orders over €150, and convenient in-store pickup 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
