NUEVO

Cosmic (4) SLS (SB, incl. fin)

FOCUS GROUND SWELL >< WINDY EURO WAVES (NOT FOR ONSHORE)

incl. VAT, plus shipping
Variante:

C50:yellow

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Item-no. 14270-1003

SOME WAVES YOU DON'T JUST RIDE — YOU EARN THEM. THE COSMIC (4) SLS WAS BUILT FOR EXACTLY THAT MOMENT. ENGINEERED FOR THE TOUGHEST SPOTS ON EARTH — MAUI, CAPE TOWN, CABO VERDE — IT SINKS INTO THE WAVE AND GRIPS HARDER THE HARDER YOU PUSH, TURNING RAW POWER INTO YOUR TIGHTEST, MOST COMMITTED TURNS YET.

The COSMIC (4) SLS is Duotone's SLS-tier wave board for advanced to expert riders in powerful ground-swell conditions. It is not designed for onshore waves; its focus is side/side-off and offshore ground swell at high-performance wave spots (Maui, Cape Town, Brittany, Cabo Verde, Ireland, Chile, Mauritius).

Construction: FULL CUSTOM SLS with S_GLASS+ reinforcement. The SLS build uses a lower carbon content than D/LAB; Innegra is replaced by S_GLASS+. The FULL CUSTOM production process delivers consistent weight and flex across every board leaving the factory.

Shape system: Built on the SYNCED CURVES CONCEPT, developed using the proprietary AI_BOARD_3D software. Rocker line, outline and rail curvature are synchronized throughout the board length so the three shape elements amplify rather than cancel each other.

3-STAGE ROCKER: flat mid-section in-between the straps for a stable stance; nose rocker activates right in front of the front straps for front-foot-initiated bottom turns; kickstarter tail-kick (progressive from the last 4–5cm) enables tight, snappy top turns. The COSMIC (4) SLS update adds a touch more nose rocker for improved white-water crossing.

Outline: narrower nose and tail than the GRIP model. Narrower nose delivers more control at speed in ground swell. Narrower tail improves control in higher waves.

Bottom shape: V double concave in the front transitions to a flat double concave underfoot, then mono concave toward the tail for high-speed rail-to-rail stability.

2027 changes:

> Refined tail outline: improved turn-ability and grip

> Refined tuck line (mid-front): quicker acceleration and improved control

> Added nose rocker: cleaner white-water crossings

Target rider: advanced to expert wave windsurfer 

Best for: powerful ground swell, side and side-off wind angles, World Cup wave spots 

Available sizes: 74, 76, 78, 82, 88, 94, 106 liters Package: includes fins (Slot Box)

STOP FIGHTING FOR GRIP. ON A WAVE THAT SCARES EVERYONE ELSE, THE COSMIC (4) SLS HOLDS ITS LINE — AND BEGS FOR MORE. YOUR BEST TURN IS WAITING. 

FULL CUSTOM SLS TECHNOLOGY
The FULL CUSTOM SLS TECHNOLOGY is build like a real custom made board
UNRIVALED BROAD RANGE
Revolutionary new shape concept: as stable and energy-saving as a 5 liter bigger board but yet as radical as a 5 liter smaller board on the wave.
AI_Board_3D
We use our own exclusive 3D CAD software. Apart from being much more accurate and faster, complex 3D design tasks such as our ground-breaking SYNCED CURVES CONCEPT would otherwise have been simply impossible to realize. 
Exclusive Board Production
All our boards are CNC shaped now in our exclusive factory to guarantee superior weight vs. strength ratio, quality and accuracy.
Focussed World Cup wave designs
Designed to work all around the globe with focus on groundswell up to windy Euro wave conditions.
Exclusive Fin Production
All our fins are produced in our exclusive factory now. Instead of using one technology for all our fins we are using 3 different technologies according to the fin length and range of use.
Cosmic (4) SLS (SB, incl. fin) - C50:yellow
Slower Waves >< Faster Waves
SNAPPY TURNS >< MAX. CONTROL
Euro Waves >< Ground Swell
JUMPING >< DOWN THE LINE
Onshore >< Sideshore
BACK FOOT SLASHES >< FRONT FOOT CARVING
Freestyle Ability
CLASSIC >< NEW SCHOOL
BOARD
VOLUME (L)
WIDTH (CM)
LENGTH (CM)
TECHNOLOGY
WEIGHT (KG) (+/-5%)
FITTINGS
MAX. SAIL SIZE (M²)
BEST MATCHING ION BOARDBAG*

Main color specs when repairing the board: Top: Pantone 389 C | Bottom: Pantone 3575 C

BOARD SIZE RECOMMENDATIONS

Please note that due to our new shaping concept, most of our team riders are using approx. 5 liters bigger boards than before. This improves the stability even further while the new shapes are still easier and more radical on the wave.

  • High wind small board: body weight (kg) + 0 >< 5 liters

  • Everyday main board: body weight (kg) + 5 >< 10 liters

  • Float & ride big board: body weight (kg) + 10 >< 15 liters

default

Comparison Technology Levels

FULL CUSTOM D/LAB
(used on all D/LAB boards)

- For these boards we use our most high-tech raw materials (Carbon, Innegra/Kevlar) resulting in the lowest possible weights, crispest ride sensation and maximum dent-resistance.

FULL CUSTOM SLS
(used on all 2026 SLS boards)

- The SLS construction uses a lower Carbon content and the Innegra is replaced by our exclusive S_GLASS+. This results in a more attractive price level.
- These boards are approx. 300g heavier than the D/LAB boards.
- Due to the FULL CUSTOM CONSTRUCTION the SLS boards are stronger and lighter than comparable boards made in the usual semi custom construction.

FULL CUSTOM PVC-WOOD
(used on ULTRA FreeWave)

- Our most price attractive boards made in FULL CUSTOM CONSTRUCTION. These boards feature wood reinforcements that effectively dampen peak loads.

SEE WHAT'S RIGHT FOR YOU

ROCKER LINE

From the straps back, the GRIP and COSMIC have very similar rockers with a (rail) tail-kick at the last 4-5cm from the tail.
> Allows both boards to perform super tight top turns.

GRIP
In the mid section between the mast-track and the nose, the GRIP has slightly less nose rocker.
> The lower front two-thirds of the GRIP allows the board to plain up earlier and at a tighter angle to the wind.
> It will also keep its momentum better at lower speeds, more drawn out turns and rounder/flatter/ less powerful waves.
> On the wave this lower front section puts you in a more upright position, making it much easier to engage the front foot during bottom turns.

COSMIC
Features a higher rocker in front of the straps and at the nose.
> The board needs more power to maintain its speed. Therefore it requires a more powerful wave and/or wind.
> In marginal conditions, you will end up having to bare off the wind more to keep your speed. Therefore, it is less suitable for smaller onshore waves.
> However, on a powerful ground-swell wave, the board will push back less and tends to sink more into the wave. This gives you more control on a full rail turn and the board will want to turn harder the harder you engage it.

BOTTOM SHAPE

Both boards feature a V double-concave in the front.
> Improves riding comfort, control going out and upwind performance.

GRIP
Maintains an alternating V throughout the entire length.
> The V acts like a seesaw, making it easier to put the board onto the rail even in slower waves.

COSMIC
The bottom transforms into a flat double concave underneath the feet, followed by a mono concave towards the tail.
> Provides additional control even during high-speed rail-to-rail turns on fast ground-swell waves.

OUTLINE

GRIP
Features a wider nose-area.
> Generates more lift when deeper in the water and gives the rail more resistance when in the water, giving you more power/drive on smaller or less powerful surf.

COSMIC
Features a narrower nose outline.
> Gives you more control during the bottom turn at higher speed in bigger ground-swell waves.

TAIL SHAPE

GRIP
Features a wider tail.
> Provides better acceleration and more counter-pressure when jumping or during turns on slower waves.

COSMIC
Features a narrower tail.
> Improves control in higher ground-swell waves.

2027 Cosmic (4)2027 Cosmic (3)*2027 Grip (3)2025 Grip 42025 Grip 3
Rail to rail turning and control on ground swell waves (side><side-off)108765
Rail to rail turning and control on ground swell waves (side><side-on)910856
Planing + acceleration (important for Euro onshore)671099
Speed789910
Control overpowered109867
Top turn10101067
Bottom turn front foot1010977
Bottom turn back foot891089
Best inGround-swell side><side-offGround-swell side><side-onEuro waves up to logo-high ground-swellEuro waves up to logo-high ground-swellSmall><medium Euro waves

*D/LAB only

QUAD SETUP

Ideal for side/side-off and/or strong current as it gives you more grip especially for lighter riders and smaller boards.
Attention: does not work well in onshore conditions since the 4 fins produce extra drag and are not ideal for slashy turns especially in slower waves.

TRI SETUP

Ideal for side/side-on conditions as it allows you to go more vertical and looser in your turns. Keep in mind in higher waves a Tri setup requires a more committed vertical riding style.

TechFeature
TechFeature
DUOTONE-Windsurf_SS26_Fins-Technology

FINALLY LET'S TALK FINS

THE MATCHING FIN DESIGN HAS A SIMILAR IMPORTANCE TO THE BOARD PERFORMANCE AS THE RIGHT MAST FOR THE SAIL.
THAT'S WHY WE HAVE SPENT A TREMENDOUS TIME AND EFFORT INTO SETTING UP A TRULY UNIQUE FIN RANGE.


360° R&D
We don't just buy external stock fins. Instead one and the same team is now responsible for the board and fin development. This results in a perfectly matching unit lifting the board-fin performance to the next level.


FIN SPECIFIC TECHNOLOGIES
Instead of using one technology for all our fins we are using 3 different technologies according to the fin length and range of use:

- PREPREG FOR ALL LONGER FINS >> lighter than G10 and with adjustable flex due to the moulding process. 50% stronger than the usual RTM technology.

- G10 FOR ALL WAVE CENTER FINS >> indestructible

- INJECTION MOULDED CARBO_TECH FOR SHORT SIDE FINS >> guarantees necessary flex even on short fins
DUOTONE-Windsurf_SS26_Fins-Technology_2

FINALLY LET'S TALK FINS


THE 2 MOST INFLUENTIAL FIN DESIGNERS
With Dani Aeberli and Kai Hopf, the two Windsurfing fin designers with the most experience are responsible for our new fin range.


EXCLUSIVE PRODUCTION
Setting up our own exclusive production was inevitable to take our fin performance to the next level. Every process is supervised on site by our own QC specialist Vasin Siritho to guarantee the highest level in quality and consistency.


FOR ALL THESE REASONS, WE HIGHLY RECOMMEND TO ONLY USE THE FINS SUPPLIED WITH THE BOARD.
THIS IS THE WAY - TO UNLEASH THE BOARD'S FULL POTENTIAL!

+6 WARRANTY

REGISTER YOUR NEW DUOTONE BOARD FOR FREE ON OUR WEBSITE WITHIN 60 DAYS OF PURCHASE AND RECEIVE AN UNRIVALED EXTENDED WARRANTY OF 6 MONTHS BEYOND THE LEGAL WARRANTY PERIOD OF YOUR COUNTRY (EXCLUDING DENTS).

PLEASE REGISTER HERE

Need guidance or help?

Any comments or questions? Here you’ll find first hand R&D / rider Information.

The more info you provide, the more specific the advice/help will be. Please let us know:

  • Your skill level

  • Your body weight and size

  • Mast(s) you plan on using with the sail

  • Board(s) you are using

  • Conditions/spots you are sailing at

Please note: To help as many people as possible follow the thread, the forum language is English only.