a bladderless inflatable kite usable to propel humans , wherein the kite foregoes some or all conventional bladder structures . a bladderless or partially bladderless inflatable kite reduces the weight , and reduces problems associated with rubbing between the bladders and the outside layer , or the like . a bladderless kite structure is formed of a material that comprises a laminated mix of carbon and polymer filaments into a laminant structure wherein unidirectional prepreg tapes of in - line plasma treated fibers are spread to mono - filament level films and bonded with a uv absorbing titanium resin .