Our original MILF “Maximum Intensity Leading Foil” fin profile in a firm glass filled construction: A large variety of fun, fast and loose fin set up options including tri-fin, quad, five-fin and two plus one variation. Two 4.625”height, 4.44” base single foiled leading fins, one 4.56”height, 4.25” base double foiled trailing fin. Two 3.75” height, 3.6” base double foiled trailing fins.