"Which foil should I put on it?" is one of the main questions we get asked most about the Duotone Foil Assist. The motor gets you up, but the front wing decides how the session feels once you're flying.
Here's how I'd choose. Learn on a Free 2.0. Then the Crest is the best all-rounder, the Glide 3.0 is the one for downwinding, and the Carve is the one for big, messy, fast waves, where you need the most control.
Crest SLS 2027 — the all-rounder we'd put most Foil Assist riders on.
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Free 2.0
Learning to foil
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Crest
Best all-rounder
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Glide 3.0
Downwinding
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Carve
Big-wave control
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Learning? Start on the Free 2.0
Duotone Free 2.0 — big, stable and forgiving.
If you're new to foiling, start with the Duotone Free 2.0. It's a big, stable, mid-aspect wing that lifts early and stays predictable. That's exactly what you want while you're learning to balance on a foil, and the motor means you're not fighting for speed at the same time.
Sizes run 1300, 1600 and 1900cm², with a new 1000cm² due in spring 2027. For learning on a motor, stay towards the bigger end.
Duotone Front Wing Free 2.0.
The best all-rounder: Crest
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Crest SLS 2027 and Crest D/LAB.
Once you can fly and turn, the Crest is the foil I'd point most people at. It suits the way most riders end up using a Foil Assist: motor up, catch something, motor off and ride it. It works for prone, waves, wake and wing.
It's a mid-aspect, stall-friendly shape with upturned tips. It pumps easily, turns hard and links waves and bumps without stalling. The Crest SLS 2027 is the newer, more affordable carbon version, and the Crest D/LAB is the premium one.
Duotone Crest D/LAB front wing.
Downwinding: Glide 3.0
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Glide 3.0 SLS and Glide 3.0 D/LAB.
For downwind runs, the Glide 3.0 is the better tool. It's high aspect, built for glide and efficiency, with a Crest-inspired profile so it still lifts and pumps easily at low speed.
On a Foil Assist that efficiency pays you back twice: a wing that glides further needs less motor, so your battery lasts longer. Glide 3.0 SLS runs 825 to 1400cm², and Glide 3.0 D/LAB 600 to 1100cm².
Big, messy, fast: Carve
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Carve 3.0 D/LAB and Carve 3.0 SLS.
When it's really big, with lots of turbulence in the water, I go to the Carve. The Crest is very good in almost everything, but in properly big waves it can top out and become unstable. I've found that myself in Cornwall. In well overhead surf, double head high, the Carve gives you that extra comfort, control and security, and it handles the highest top speeds, which you can easily hit on big breaking waves.
To be clear, those conditions are for advanced riders only. I'd rather nobody took an electric foil out in dangerous surf, especially overhead, barrelling waves. But if you're going to, the Carve is the foil you want.
That doesn't make the Carve itself an expert-only foil. It's low aspect, and low aspect foils are very stable, quite similar to the Free. It isn't the most efficient foil, but there's nothing wrong with learning on one.
Carve 3.0 D/LAB and Carve 3.0 SLS are both on the site.
Quick guide
| Foil | Sizes (cm²) | Pick it for |
| Free 2.0 | 1300 / 1600 / 1900 (1000 spring 2027) | Learning to foil, flatwater cruising |
| Crest SLS / D/LAB | SLS 475 – 1050 · D/LAB 550 – 1200 | The all-rounder: waves, prone, wake and wing |
| Glide 3.0 SLS / D/LAB | SLS 825 – 1400 · D/LAB 600 – 1100 | Downwinding and covering distance |
| Carve 3.0 SLS / D/LAB | SLS and D/LAB 650 – 1100 | Maximum control in big, turbulent, fast waves; stable enough to learn on too |
On a foil assist, stay towards the bigger end of each range until you're confident.
Will it fit my mast?
The D/LAB Foil Assist masts use Duotone's 3BS connection, so all of these go straight on with a Duotone fuselage. The aluminium masts take a fuselage adapter, which also opens them up to other foil brands. If you're not sure what you need, send us your setup and we'll check it.
Our first look at the Duotone Foil Assist.
💡 Sam's Tip
If you only buy one foil for your Foil Assist after learning, make it a Crest. Add a Glide 3.0 if downwinding becomes your thing. If you ever find yourself out in properly big, turbulent waves, which are advanced-only conditions whatever foil you're on, take the Carve. That's where its control and top speed make all the difference.
Not sure which foil? Ask us.
Send us your weight, your board and where you ride, and we'll tell you which foil and size we'd put on your Foil Assist.
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