Ray and Jeanne Merry update the FlowformWith its uniquely vented design, the UltraFoil 15 has a very wide wind range. In light winds, its tall airfoils get more lift. The lower vents aid in initial inflation and the upper vents relieve pressure. In strong winds, the dynamic trailing edge vent opens to release a stabilizing jet of air. A high angle flier with good, consistent pull, it's perfect for lifting Line Laundry. Made of ripstop nylon, it needs no assembly and has nothing to break. Wind range: 5 to 30 mph. 14-ft ripstop nylon tail. 8" x 13" case. 3'-0" x 4'-8". Use 150-lb. Dacron line.