A basic sail design element is the depth of shaping cut into the sail body.

 Some designers opt to shape the sail body generously with seam curves. This approach can work well in specific wind ranges, although testing indicates that overly full designs narrow the effective wind range. Full shapes are difficult if not impossible to remove. A flat sail body is required for cutting-edge upper end performance.

The Loft designs sails with forward shape orientation and a flattish sail body with generous mast pocket rotation/mast overlap.

This configuration can be made effectively full with release of outhaul tension. Sail shape that de-rotates into the sail body from the front of the foil produces a large wind range and a comfortable stable feel.

Sails can include both low-end power and ease of use in the upper end if the design anticipates trim impact.

Trim sensitivity designed into the sail is key to expanded wind range.