The aircraft is made from bolted-together aluminum tubing. In its ultralight trike configuration the ST-Freestyle features a cable-braced hang glider-style high-wing covered in Dacron sailcloth, supported by a single tube-type kingpost with weight-shift controls utilizing an "A" frame weight-shift control bar. The trike wing can be removed and a powered parachute wing substituted in a few minutes. In that configuration the wing is controlled by conventional paraglider brakes for steering. The engine package can also be removed from the wheeled fuselage frame and the aircraft then foot-launched as a powered paraglider using the same wing.
Pilot accommodation is a single-seat open cockpit without a cockpit fairing. The ST-Freestyle has tricycle landing gear and a single electric motor in pusher configuration. The powerplant is a ST Elektro ST100 or ST200 electric motor driving a shrouded three-bladed composite propeller.
