Complete Assist Foil Package

Duotone Crush Board - D/LAB Assist Foil - Crest D/LAB Foil Plane - SLS 3-Blade Gold Propeller

Duotone Crush Board:

2025 Duotone Crush SLS

PRONE SURF

Size: 4'10" x 19.75" - 40L

Size: 4'6" x 18.5" - 30L

Introducing the Crush SLS – a brand-new board designed specifically for Prone Foiling. With a flat rocker for easy paddling and a raised nose to prevent catching on the water, this board is made to get you into waves you normally wouldn’t think of surfing. Its wide tail and nose provide exceptional wave catching ability and ease of use during touchdowns and in whitewater, ensuring a smooth and controlled ride.

The Crush SLS features cut-outs in the tail for early release and a single concave to flat bottom shape for maximum paddle speed and glide. Additionally, the slightly raised front foot angle increases responsiveness while maintaining pumping efficiency, allowing for precise maneuverability, and effortlessly linking waves.

With its volume distribution, flatter rocker, and our SLS construction, the Crush SLS is all about easy entry into waves. With a perfect combination of stability, glide, and responsiveness the Crush SLS is the ultimate board for Prone Foiling enthusiasts looking to take their skills to the next level.

Performance

Specs

Cut-outs

Cut-outs in the tail of the board are designed for the earliest possible release of the water, enhancing the performance when taking off.

Foil tracks

Our new and longer carbon foil tracks offer more adjustability and an even wider range of foil placement options while also reducing the overall weight of the board.

Prone-optimized outline, rails, and rocker

The outline, rails, and rocker are specifically designed to enhance paddle speed, maneuverability and performance while foiling.

Thin and clean deck

A minimalistic deck design ensures a direct connection to the foil, providing enhanced control.

Low rocker

The optimized rocker design allows for easiest wave catching and efficient pumping when linking waves.

Low drag outline

A wider nose and tail enhance stability while providing maximum paddle speed and glide for touchdowns.

Lightweight

Minimum weight ensuring easy handling, enhanced maneuverability, and performance.

Weight saving

No inserts to keep the Crush SLS’s weight to a minimum

Nose rocker

The slight nose rocker helps to prevent plowing, ensuring a smoother ride and easier takeoffs.

Rails

The soft rails provide forgiving touch downs, enhancing stability and control while having water contact

Cut-outs

Cut-outs in the tail of the board are designed for the earliest possible release of the water, enhancing the performance when taking off.

Foil tracks

Our new and longer carbon foil tracks offer more adjustability and an even wider range of foil placement options while also reducing the overall weight of the board.

Weight saving

No inserts to keep the Crush SLS’s weight to a minimum

Nose rocker

The slight nose rocker helps to prevent plowing, ensuring a smoother ride and easier takeoffs.

Rails

The soft rails provide forgiving touch downs, enhancing stability and control while having water contact

D/LAB Assist Mast:

Duotone Foil Assist Set D/LAB

Prone Surf / Downwind Foil Assist Package

The Duotone Foil Assist Set D/LAB is the lightest, stiffest, and lowest-drag Foil Assist setup in the Duotone range. Built for high-performance prone surf foiling and downwind riding, the D/LAB system is ideal for connecting small to medium waves, linking bumps, and maximizing glide with minimal drag.

Designed around the premium carbon eMast D/LAB, this setup delivers the highest level of performance, control, and efficiency in the Foil Assist lineup. The slim carbon mast profile, integrated motor pod, and two-blade folding propeller help preserve the natural feel of foiling while giving you power when you need it.

Important Compatibility Note: The eMast D/LAB features a 3BS connection and is compatible with Duotone and Armstrong foils when used with the specially designed eFuselage. Optional wing sets include larger front wings. For smaller front wing options, please call or text us before ordering.

What’s Included

eMast D/LAB Set

Built from lightweight carbon and measuring 84 cm, the eMast D/LAB is the lightest and most advanced mast in the Duotone Foil Assist lineup. Its slim, low-drag profile delivers playful and precise turning, exceptional rigidity, and maximum speed potential.

The motor pod is seamlessly molded into the mast profile and positioned 17 cm below the top plate to minimize drag, even during touchdowns. The two-blade folding propeller reduces resistance for effortless glide on the wave, while the integrated gear system allows the propeller to unfold instantly when power is needed.

The eMast mounts to your board and fuselage like a conventional foil mast and is compatible with most foilboards that use a standard track mount system.

Performance 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 35L.

eHarness Set

The Foil Assist system is powered by two compact batteries housed in a waterproof battery box mounted on a lightweight eHarness, weighing approximately 3.76 kg. This keeps extra weight and drag off your board while preserving the natural, fluid feel of foiling.

With the batteries positioned on your hips, the eHarness allows full freedom of movement while riding. The harness is buoyant and easy to remove, and the cable runs neatly along the shorter board leash to connect the battery system to the eMast. The receiver integrated into the battery box provides a stable and reliable connection between the remote and motor throughout your session.

eRemote Watch Ring Set

The included eRemote Watch Ring Set combines a waterproof smartwatch-style controller with a finger ring controller. This hands-free design makes it easier to push up from the board, paddle, duck dive, carve, or handle a wing while maintaining control of the Foil Assist system.

Activate the motor with a double-click of the + button, then control speed by pressing and holding the + or - button on the ring controller.

Battery Charger Set

The included charger can fully charge both batteries in under one hour and features a discharge function to help maintain long-term battery health.

Air Travel-Friendly Battery Set

Depending on rider skill level, foil setup, and conditions, the Foil Assist batteries provide approximately 30 to 60 minutes of runtime per charge.

Key Features

Premium Duotone Foil Assist package for prone surf and downwind foiling
Lightweight 84 cm carbon eMast D/LAB
Lightest, stiffest, and lowest-drag mast in the Duotone Foil Assist range
Integrated low-drag motor pod molded into the mast profile
Motor positioned 17 cm below the top plate to reduce drag during touchdowns
Two-blade folding propeller for efficient glide
Instant propeller unfolding with integrated gear system
Lightweight eHarness keeps batteries off the board
Waterproof battery box with integrated receiver
Waterproof eRemote Watch Ring Set for hands-free speed control
Air travel-friendly battery set with 30 to 60 minutes of runtime
Charger can fully charge both batteries in under one hour

Compatibility

eMast D/LAB uses a 3BS connection
Compatible with Duotone and Armstrong foils when used with the correct eFuselage
Compatible with most foil boards using a standard track mount system
Recommended front wing size: 900 cm² or larger for optimal battery performance
Recommended board volume: 35L minimum

Questions or need help coordinating an order? Contact either of our stores and we’ll help confirm compatibility before you buy.

Follow these steps if the bungee cord loop becomes undone or needs to be replaced:

Wrap the bungee cord loop around the cable.

Insert the rail saver through the bungee cord loops.

Insert the railsaver through the leash string(s), then close the Velcro flaps around the bungee cord and string(s), ensuring it is tight and will not come undone.

Duotone ePropeller 3-Blade SLS with Mount | Performance Foil Assist Propeller Upgrade

The Duotone ePropeller 3-Blade SLS with Mount is built for riders who want more boost, higher top-end speed, and stronger efficiency from their Foil Assist setup. Designed for advanced foilers, this performance propeller upgrade delivers noticeably more thrust, making it easier to run smaller front wings, lower-volume boards, and faster, more dynamic setups.

Compatibility

Designed for Duotone Foil Assist systems using the dedicated 3-Blade SLS mount. Installation requires removing the standard 2-blade propeller and mount before fitting the 3-blade mount and blades.

Overview

The 3-Blade SLS Propeller is a performance-focused upgrade for riders pushing for more acceleration, speed, and efficiency on foil. It performs especially well in bigger or faster swells, on flatter water where added speed matters, and for riders who want stronger support with less battery strain.

Why Customers Choose It

Delivers more thrust and acceleration than the standard 2-blade setup
Supports smaller front wings and lower-liter boards with more confidence
Performs well in bigger, faster swell and higher-speed riding conditions
Can help improve runtime efficiency by reducing battery load in the right setup

Performance

3-blade design provides stronger, more immediate power delivery
Adds extra speed on flat water and improved drive in faster conditions
Well suited for riders above 80 kg seeking more boost and stronger acceleration

Build & Design

Constructed from durable aluminum for strength and long-term use
Dedicated 3-blade mount is designed for secure system integration
Upgrade format allows a quick transition from the standard 2-blade setup

Specifications

Product Type: 3-blade Foil Assist propeller upgrade
Material: Aluminum
Configuration: 3-blade SLS propeller with dedicated mount
Use Case: Higher thrust, speed, and efficiency for advanced Foil Assist riding
Recommended Rider Profile: Advanced riders, especially above 80 kg

What’s Included

Duotone ePropeller 3-Blade SLS blades
Dedicated 3-Blade SLS mount

Best For

Advanced Foil Assist riders looking for more power and speed
Heavier riders who want stronger acceleration and support
Foilers riding bigger swell, faster swell, or flatter water at higher speeds
Riders using smaller front wings or lower-volume boards

Additional Notes

The stronger, less gradual power delivery of the 3-Blade SLS makes it a better fit for experienced riders rather than beginners. For installation guidance, view the full instructions here.

Video

Need Help Choosing a Setup?

If you need help choosing the right foil assist propeller, compatibility, or the best Duotone Foil Assist setup for your riding style and conditions, our team can help you dial it in.

Crest D/LAB Foil Plane:

Duotone Crest D/LAB Front Wing

Prone Foiling | Freefly | Wake Foiling | Foil Assist

The Duotone Crest D/LAB Front Wing is engineered for riders seeking maximum performance in prone foiling, foil assist riding, wake foiling, and high-performance carving. Designed to deliver instant response, exceptional maneuverability, and efficient glide, the Crest D/LAB thrives in everything from small wind swell to powerful mid-sized surf.

Featuring a playful outline, moustache-inspired curvature, and upturned wing tips, the Crest D/LAB combines tight-turning agility with confidence-inspiring control. Whether you're connecting waves, pumping back out, launching airs, or recovering from tip breaches, the Crest D/LAB delivers smooth, predictable performance in every phase of the ride.

Why You'll Love It

Ultra-responsive turning with intuitive rail-to-rail transitions
Excellent glide and pumping efficiency for linking multiple waves
Forgiving stall characteristics for improved control and recovery
Smooth re-entry from tip breaches, foil slides, and aerial maneuvers
Wide speed range for everything from small surf to larger waves
Lightweight, low-drag D/LAB carbon construction
Compatible with D/LAB Tails, S & PX Stabilizers, and Monobloc Tails

Instant Response & Fluid Carving

The Crest D/LAB was developed for riders who prioritize maneuverability and flow. Its unique planform and optimized curvature create immediate response underfoot, allowing seamless transitions between turns and precise control while carving critical sections of the wave.

Whether you're riding mellow peelers or steeper, more powerful faces, the Crest D/LAB adapts effortlessly to changing conditions while maintaining speed and control.

Efficient Glide & Wave Connectivity

Connecting sections and linking multiple waves becomes effortless thanks to the Crest D/LAB's efficient pumping characteristics and impressive glide. The forgiving stall speed allows riders to maintain momentum through slower sections while providing confidence during aggressive maneuvers.

This combination of efficiency and control makes the Crest D/LAB an exceptional choice for prone foilers and foil assist riders looking to maximize every ride.

Dynamic Maneuverability

The Crest D/LAB's specialized wingtip design promotes smooth recovery from tip breaches, foil slides, and aerial maneuvers. Its forgiving nature allows riders to push harder and experiment with more progressive lines while maintaining confidence and control.

The result is a front wing that encourages creativity and progression without sacrificing performance.

Advanced D/LAB Construction

Built using Duotone's premium D/LAB construction technology, the Crest minimizes drag while maximizing stiffness and responsiveness. Reduced visible hardware creates cleaner water flow and a streamlined appearance that reflects its high-performance design philosophy.

The lightweight carbon construction delivers immediate feedback and precise handling across a broad range of riding conditions.

Complete Tuning Flexibility

The Crest D/LAB is compatible with:

D/LAB Tails
S Stabilizers
PX Stabilizers
Monobloc Tails

This extensive compatibility allows riders to fine-tune their setup for maximum performance across multiple disciplines and riding styles.

Available Sizes

675 cm²
800 cm²
925 cm²
1050 cm²

Key Features

Wide Speed Range

Maintains control and efficiency across a broad range of wave sizes and riding speeds.

Instant Response

Provides immediate and intuitive turning for fluid carving and precise maneuverability.

Wave Connectivity

Excellent pumping efficiency and glide make linking waves effortless.

Fluid Re-Entry

Recovers smoothly from tip breaches, foil slides, and aerial maneuvers.

Setup Compatibility

Works seamlessly with D/LAB Tails, S & PX Stabilizers, and Monobloc Tails.

Moustache Curvature Design

Unique curvature and upturned wing tips enhance control, agility, and turning performance.

Low Drag Construction

Premium D/LAB carbon construction minimizes drag while maximizing responsiveness and efficiency.

Performance

Duotone Crest D/LAB Performance Chart

Sizes & Specifications

Duotone Crest D/LAB Specifications

Videos

Questions? Our team rides what we sell and is happy to help you choose the right foil

Crush'n it Duotone Assist D/LAB Foil Package