A "kitesurfer" or "kiteboarder" uses a board with or without foot-straps or bindings, combined with the power of a large controllable kite to propel the rider and the board across the water. In 2006, the number of kitesurfers has been estimated at around 150,000 to 210,000, with 114,465 inflatable kites sold that same year. Various surfing styles have appeared to suit both kitesurfers and conditions, such as "waveriding", "freestyle", "freeride", "jumping", and "cruising".