The 20s is a small non head foil furler. Like most single line furlers the line coils up around a drum when you pull the sail out, then wraps it around the head stay when you pull on the line. To get more wrap, manually wrap the head sail when all the line is pulled out. I lie 2-3 wrap of the sheet around the headsail when done so roll a bit of line around the drum before manually wrapping things.