The jib is design for maximun wind speed, however, with a cross cut design, the sail is very forgiven, allowing to be used in moderate wind conditions, which is a great advantage if the wind suddenly dies half way through the leg.

Cut: The sail is cross-cut panels made of extra firm Dacron HTP and radial reinforcements for clew and head allowing longer durability. RBS tapered battens, visibility window and two draft stripes

Jib trim: Once the wind picks up over 19 knots, you will need to change to the little jib. Set the lead so the foot of the sail touches the foot of the pulpit and the leech remains 2" inside the spreader. If the wind goes over 25 knots move the lead back 1" to tighten the foot of the sail and to open the leech directly to the spreader end.
Also, when you first change to the jib, loosen the shrouds one scale.