If you like the power delivery and back hand feel of a four batten sail, then the S1 is Severnes sail for you. The S1 has been going for many years now and it's been gaining popularity with those that tend to ride waves, due to the softer 'feel' of the sail when compared to the Blade or other 5 batten sails, so for wave riding it is not quite as 'rigid' a feeling..it has 'give' in it (hope that makes sense). High wind stability is slightly less than the Blade but there's always a price to pay somewhere within a sails design.. so just change down when getting overpowered! This is what Severne say... 

The S-1 is the high performance 4 batten wave sail. The reduced batten count makes this sail light, flexible and responsive. Engineered for any type of conditions, this lightweight powerhouse redefines responsiveness. The S-1 has more back-hand pressure than the Blade, calibrated to go vertical or launch into aerial moves.  A fat head on the latest generation S-1 opens more under load to increase the performance envelope; more high-end control and wind range. The aspect ratio has been decreased on the smaller sizes to reduce twitchiness. Combined with the fatter head, the area distribution is more obvious.

The 025 S-1 utilises X-Fusion technology; ultrasonically welding the foot panels, negating the need for stitching. Lighter, more responsive, and no stitching to wear out. X-Fusion is an evolution of Carbon-Fusion technology used in the PRO sails that have trickled down to more accessible models. Both the S-1 and S-1 Pro are developed on an identical platform. The PRO construction offers the ultimate experience while the S-1 replicates the dynamic performance in a more accessible construction. Proprietary GRADIENT PANEL  TECHNOLOGY reduces weight, increases strength, and controls stretch logically. Direct transmission of power. Increased longevity.

The S-1 is built using premium materials. The S-1 features quality materials including VX2, Spider-Fibre, and eM4. The S-1 Pro is crafted in CARBON FUSION.

Using the new GRADIENT PANEL TECHNOLOGY. Corners have overlapped panels which reduces the amount of patching. At the same time these overlapped areas extend into the body of the sail so it transitions the load much better, will be less stretch over time. It’s a more stable way of building sails.

The GRADIENT PANEL TECHNOLOGY logically reduces weight, increases strength and controls stretch. Overall weight is reduced but the more significant improvement is the feel – quicker reacting and lighter feel.

Rather than a single curved luff panel, we use separate panels – split luff – that radiate out of the head and tack corners. This perfectly aligns the sail material with the direction of load.

Previously the curved panel would have bias stretch in all the wrong places. Direct transmission of power. Increased longevity.

DEVELOPED WITH JAEGER STONE - LOWER ASPECT RATIO IN SMALLER SIZES - FATTER HEAD

XFUSION TECHNOLOGY – WELDED FOOT PANELS - IMPROVED CONSTRUCTION DETAILS

SIZES *3.0 / 3.3 / 3.6 / 4.0 / 4.4 / 4.6 / 4.8 / 5.0 / 5.2 / 5.6m     * 3.0m is a Special Order Sail - Enquire Here

See Pic 5 for Specs.

Available in Red CC1 and GREEN CC2