SEVERNE S-1 PRO 2026

S-1 Pro

The S-1 Pro is the highest performance 4-batten wave sail. Entirely constructed in CarbonFusion to deliver ultimate reactivity. The carbon fibre instantly transfers power, and welded seams and batten pockets eliminate any lag. Precision.

The S-1 Pro showcases the pinnacle of SEVERNE’s construction technology: the complete sail, including the batten pockets, is welded CarbonFusion. This creates a smooth, stitchless sail from the back of the mast sleeve to the leech. Eliminating the thousands of micro-holes created by stitching has multiple benefits:

• Instant response. Less stretch and movement under load

• Stronger

• Smoother

The S-1 Pro is the ultimate manoeuvre-oriented wave sail.

SIZES: 3.0 / 3.3 / 3.6 / 4.0 / 4.4 / 4.6 / 4.8 / 5.0 / 5.2 / 5.6
CARBON FUSION

PRECISE. ALIVE. ELECTRIC

Our search for higher performance has brought us CarbonFusion, the next level in load-path sail construction.

CarbonFusion sails are composed of three key components:

• Material

• Fused seams

• Load path frame

The result of these three components effectively turns the sail into a spring. Load it up and release for explosive performance.

MATERIAL

UNIDIRECTIONAL CARBON FIBRE + OFF-AXIS DYNEEMA

Unidirectional carbon is aligned to all primary load paths and eliminates stretch. Off-axis Dyneema enables horizontal elasticity, allowing the sail to flex and react with lightning speed. Superior fibres deliver superior performance:

• DYNAMIC: Carbon warp with no stretch combined with medium-stretch 45° Dyneema

• STRONGER: Dyneema is one of the strongest fibres available

• LIGHTER: Carbon has the highest strength-to-weight ratio

FUSED SEAMS

ULTRASONICALLY WELDED SEAMS

Each carbon segment is ultrasonically welded in place. This has multiple advantages over traditional sewing techniques:

• STRONGER: Full seam adhesion without puncturing the films with needle holes

• LIGHTER: Removal of outer seam tapes and thread

• ACCURATE: No seam shrinkage from outer tapes or thread tension

LOAD PATH FRAME

PANEL LAYOUT ALIGNED TO LOAD PATHS

Each panel is strategically placed to align with the sail’s specific loads on all sizes. This has multiple advantages over aesthetic panel layouts:

• LIGHTER: Accurate fibre alignment allows thinner films and lighter sails

• STRONGER: High density of Dyneema and carbon in critical areas

• LIGHTNING RESPONSE: Carbon fibre transfers load instantly without lag

Primary load paths:

1. PRIMARY LOADS
   Run vertically between head and tack. Downhaul tension transfers directly through the carbon warp.

2. FOOT LOADS
   Transfer between tack and clew. High-density fibre adds impact strength in this area.

3. LEECH LOADS
   Run vertically up the leech, tensioning the carbon and springing back for explosive performance.

4. BODY LOADS
   Body tension is transferred out of the head and clew.