The Biker Scout first graced our screens in 1983 during Return Of The Jedi. They were the speeder bike riding Imperial troops who, unfortunately, came a cropper at the hands of the Ewoks. Nevertheless, the costume remains an extremely popular choice for people wishing to build (or buy) an Imperial costume.
One of the main advantages of the Biker Scout, over a Stormtrooper or TIE Pilot, is the comfort. The costume has more soft parts than most and the helmet affords excellent all-round vision. All this and the fact you can sit-down!