Supported leading edge kite (SLE) is a type of power kite used mainly for kitesurfing.
It refers to a C shaped kite leading edge inflated (LEI) kite where the lines which control the angle of attack (or sheeting) of the kite attach to a bridle via a pulley in a similar way to that of a bow kite. Due to the wider range of angle of attack possible, relative to the wind, this system has vastly improved C kites' ability to depower and has increased the possible wind range.
See also Kitesurfing Snowkiting Power kite Bow kite Foil kite Kite types Kite applications Kite line Kite mooring Kite control systems
References
"Kitesurf - Kites, Kiteboards, Harnesses BLOG _ kite Tech| Unity Watersports".