Duotone Crush SLS Foil Board - 2025

If you’ve been eyeing up prone foiling (surf foil) properly — paddling into real waves, linking sections, and keeping speed through touch-downs — the Duotone Crush SLS is purpose-built for exactly that. It’s a compact, lightweight prone foil board with a flatter rocker for easy paddling speed, a slightly lifted nose to stop “sticking” on touchdowns, and a wide, confidence-boosting outline that makes small, soft waves genuinely fun.

Where it sits in the Duotone foil board range

The Crush SLS is Duotone’s dedicated prone surf foil platform — not a wing board and not a pump board. Compared with compact wing boards, the Crush feels more “paddle-friendly” and forgiving in the surf (especially through whitewater and touch-down recoveries). If your goal is prone foiling progression, wave catching, and linking, this is the cleanest option in the range. If you’re shopping for winging or downwind-specific performance, look at Duotone’s other foil board shapes instead.

Why riders choose the Crush SLS

• Easier wave entry: flatter rocker and efficient bottom shape help you build paddle speed and get in early.
• More makesable waves: wide nose/tail plus stable volume distribution make marginal surf worth paddling for.
• Cleaner recoveries: soft rails and a raised nose help you skim through touch-downs without instant stalls.
• Light + direct feel: SLS construction and a thin, clean deck keep the connection to the foil crisp and responsive.
• Simple setup: twin US foil tracks, no strap inserts (on purpose) to keep weight down.

Size guide

4'6" (30L) is the agile choice for lighter riders and anyone who wants the most “surfy”, responsive feel once you’re up and flying. Duotone recommend it for riders under 65kg.

4'10" (40L) adds paddle power and forgiveness for heavier riders or anyone who wants easier wave entry and a touch more stability. Duotone recommend it for riders under 90kg.

Specifications

Size	Volume	Width	Length	Weight	Fittings	Recommended rider weight	Footstrap option
4'6"	30L	18.5" / 47cm	4'6" / 137cm	3.04kg	2x US foil tracks	< 65kg	No
4'10"	40L	19.75" / 50cm	4'10" / 147cm	3.40kg	2x US foil tracks	< 90kg	No

Weights are manufacturer stated with a tolerance of +/- 6% possible.

Package includes

• Duotone Crush SLS 2025 board

If you’d like help building a complete setup (foil, mast length, hardware and protection), start here: Shop Duotone Wing & Foil or browse all options in Foil Boards.

Try before you buy

If you’re local (or fancy a road trip), you can book a session at our The SUP Company Test / Demo Centre (Woodmill, Southampton) and we’ll help you dial in sizing and foil placement so you’re not guessing.

Helpful reading & buying advice

• Overview of Duotone 2025 Wing Foil Boards (includes where the Crush SLS fits)
• Foil Boards for Wing, Downwind & Pump Foiling (how to choose the right shape)

FAQs

Is the Crush SLS a wing foil board?

No — it’s a dedicated prone surf foil board designed for paddling into waves. It uses US tracks like most modern foil boards, but the shape/rocker/outline is tuned for paddle speed and touch-down forgiveness rather than wing starts.

Which size should I choose: 4'6" or 4'10"?

As a simple starting point: choose 4'6" (30L) if you’re lighter and want maximum agility, and choose 4'10" (40L) if you’re heavier or want easier paddling and earlier wave entry. If you tell us your weight, local wave size, and current foil, we’ll recommend the cleanest option.

Does it have strap inserts?

No — and that’s intentional. Duotone keep the Crush SLS clean and light for prone foiling, with no strap inserts to save weight.

Will it work with my foil?

If your foil uses a standard US track mount, you’re good. If you’re unsure about mast plate sizing or track-nut compatibility, message us and we’ll sanity-check it before you order.

Can you help me set the foil position?

Absolutely. Tell us your foil model and mast length, plus your weight and surfing background, and we’ll give you a starting position that gets you flying sooner — then how to fine-tune from there.