Duotone Cosmic SLS – SUP Hardboard

Cosmic SLS

HIGH-PERFORMANCE ALL-WAVE

The COSMIC SLS is the SUP wave hardboard that can do it all. And make you better.

Shape & Bottom Contour

The rounded nose provides stability and a clean entry into the wave even at paddling speed, while the narrow Moon tail delivers maximum control and responsiveness when it matters. The bottom contour defines the performance: A mono concave in the front section generates effortless speed and keeps the board lively through weaker sections. In the middle, it transitions into a double concave that maximizes stability and balance. Toward the tail, it opens into a V that releases the water cleanly — for fast pivots and a loose, fluid feeling at the end of every turn.

Accelerate. Drive. Release. Repeat.

4+1 Fin Box System — Unmatched Versatility

Four multi-fin boxes plus a central US box make the COSMIC SLS four boards in one.

Thruster (factory setup) — Balanced all-round performance from waist-high waves to well overhead. The universal setup: precise, controlled, and powerful in all conditions.

Quad — Maximum traction. Four fins deliver maximum grip and lateral hold for critical, powerful waves where control is everything.

Twin — Ultimate loose feeling. The skatey, flowing twin-fin feel for smaller, softer waves. Draw long lines or hit hard pivots — the board breathes and surfs with a freedom no other configuration can match.

Twin + Trailer — A small center fin gives the twin setup just that extra bit of hold that makes all the difference in variable conditions.

FULL CUSTOM SLS Construction

Strong. Light. Superior.

Built with biax composite PVC sandwich technology, each EPS core is individually CNC-milled — not pressed into a mold. The result is a board that is lighter and stiffer than anything produced through conventional semi-custom manufacturing, with a laminate layup optimized for each size. Light where it counts. Strong where it’s needed.

Who is the COSMIC SLS for?

The COSMIC SLS is designed for wave beginners, intermediate to highly experienced SUP surfers seeking true wave performance. If your quiver currently includes several boards for different conditions — or if you’ve been searching for a long time for one board that can truly replace them all — this is the solution

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