Power wave or bump/jump sail. Great wind range and stable. Can be rigged full with less downhaul or more for a loser leach. For additional tuning there is also a lower eyelet.
X-ply re-enforced sail window. Other panels also X-ply apart from luff. Clear, red and black (at tip).
Very good condition. No scuffs or repairs.
Luff 409, boom 168. Preferred mast 400/19.