Duotone Foil Assist Set Alloy 2026
$5,699.00
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.
Don’t forget your fuselage adapter purchased separately here. The adapter allows compatibility with most foil brand fuselages.
FOIL ASSIST SET AL 2026
PRONE SURF / DOWNWIND
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.
SET INCLUDES
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, setup and the conditions, the Foil Assist batteries provide 30 to 60 minutes of runtime per charge.
SIZE SPECS
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.
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.
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. A fuselage adapter is required to attach the fuselage to the eMast. In addition to the Duotone adapter, we offer ten more options to help you combine the eMast with your existing foils.
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.
RELIABLE SIGNAL TRANSMISSION
The Bluetooth 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.
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SHIPPING WITH BIG WINDS
Rates, Common Questions, and Our Fastest,
Safest, Money Saving Board Delivery Ever!
U.S. SHIPPING RATES
Rates apply to mainland U.S.
Transit time calculated in business days.
| ITEM/ORDER | 7-10 Days | 3-6 Days | Need It Quicker? | |||
|---|---|---|---|---|---|---|
| Orders Less Than $100 | $15.00 | $24.99 | By Quote | |||
| Most Orders of $100 or More | Free | $24.99 | By Quote | |||
| EXCEPTIONS | ||||||
| All Used Gear (U.S. Only) | Shipping Rate is Cited on Product Pages | |||||
| Wing Foil Boards | $99 to Nearby Major Airport Freight Facility | |||||
| Downwind SUP Foil Boards | $99 to Nearby Major Airport Freight Facility | |||||
| Windsurf & Wsurf Foil Boards (10' and Under) | $99 to Nearby Major Airport Freight Facility | |||||
| Inflatable Boards (SUP & Wing) | $50 | $75 | By Quote | |||
| Directional Kitesurf & Kite Foil Boards | $50 | $75 | By Quote | |||
| SUP Paddles | $35 | $50 | By Quote | |||
| Board Bag: Flat Day Bags | $35 | $50 | By Quote | |||
| Board Bags: Wheeled/Walled Bags | $65 | $99 | By Quote | |||
| Windsurf Sails 7.0 meter or Larger | By Quote | |||||
| Windsurf Masts 460 cm or Longer | By Quote | |||||
| Alloy Windsurfing Booms 150 cm or Larger | $35 | $50 | By Quote | |||
COMMON QUESTIONS
Where's My Order's Tracking Link?
Tracking info is shared via email within 72 hours of most orders being placed. Be sure to check spam or "Promotions" folder in your Inbox, as sometimes our messages land there.
No Tracking Info Displays on Shipper's Website ...
It can take 48 hours for tracking info to display. Rest assured, your package is en route. Make sure to enter the BOL # (Bill of Lading) with no spaces in the tracking field.
Alaska, Hawaii, Puerto Rico?
Yes, we have shipped to these locations for decades by quote. Please share your address, the item(s) you needed shipped, and if an airport cargo depot pickup is possible.
Canada and International Locations?
We ship to Canada lots, and the Caribbean some. Get a quote. We rarely ship items to Europe, Asia, and Australia as it's spendy. Quotes for international orders do not include import duties.
How Can I Be Sure My Board Arrives Intact?
Opt for our $99 "To Nearby Airport" shipping option at checkout. It relies on passenger planes, and offers our safest delivery. More far below.
What if My Board Arrives Damaged?
We'll work with our shipping partner to get you a repair credit or a replacement board. Please send photos of the damaged board (and box) to shipping@bigwinds.com.
My board made it ...
But no foot straps, fins, or vent plug?
Look closely through the packaging. Fins, foot straps and vent plugs are often concealed in a sheath of cardboard that's easy to discard. Also, check inside the board box, and shake the box to be sure. You'll likely dislodge a small box containing the missing items.
HOW WE SHIP BOARDS
OPTION 1
MAINLAND U.S.
NEARBY MAJOR AIRPORT, $99
Fast
Boards depart Thursday each week, and are available for pickup Friday or over the weekend.
Safe
Minimal handling, and processing. No trucks, or gritty freight facilities. We ship using passenger planes, and direct flights when possible.
Easy
Most airport cargo depots are just far enough from main terminals to allow free parking, and easy entry. Pickup instructions and tracking info are shared via email Friday morning.
Which Major Airport is Near Me?
This link to Alaska Airlines’ options is a starting point. If no nearby options exist, we'll work with American, United and Delta airlines for a closer solution. Questions? Contact us!
OPTION 2
ALASKA, HAWAII, PUERTO RICO
NEARBY MAJOR AIRPORT, $150
Fast
Boards depart Thursday each week, and are available for pickup Friday or over the weekend.
Safe
Minimal handling, and processing. No trucks, or gritty freight facilities. We ship using passenger planes, and direct flights when possible.
Easy
Most airport cargo depots are just far enough from main terminals to allow free parking, and easy entry. Pickup instructions and tracking info are shared via email Friday morning.
Which Major Airport is Near Me?
This link to Alaska Airlines’ options is a starting point. If no nearby options exist, we'll work with American, United and Delta airlines for a closer solution. Questions? Contact us!
OPTION 3
BUSINESS OR RESIDENTIAL DELIVERY
BY QUOTE
Residential or Business Board Delivery
We'll work with freight partners for the lowest possible rate. Delivery time is 7-10 business days. Quotes typically land in the $350 - $500 range, though Big Winds will often cover a portion of this fee. Get a quote.
International Board Delivery
Board shipping rates for most international destinations are extremely pricey. But we can ship boards to Canada for as low as $275 plus duties and taxes. We can also stow your board for an upcoming Gorge visit, and help with a board bag and packing materials to ensure it flies home with you safely.
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