Sleeve sail, ideal for sailing schools. A sleeve pocket for the mast at the luff with a cutout for the sprit halyard block. This sail is created strong to last long, made of 4 US oz. high quality 100% dacron sailcloth. The sail has 4 heavily reinforced corners, a loose foot and webbing loops at both the tack and the clew point to accommodate the boom. The sail does not have any sailbattens. Should be used with sleeve mastset EX1052.