Wacoal is a science style company from Japan that creates tight shorts that tone your body as you walk. Specifically, the shorts have tension bands that make walking a bit of a work out. The panels are made of a type of resin; the tension created by the panels stimulates particular muscles as you walk and so shapes and tones your body. http://www.popgadget.net/2007/01/wacoal_shapes_a.php