POWER SYSTEMS BRAND. exclusive! NEW RESISTANCES! Fire up your ÒpowerhouseÓ core muscles while increasing flexibility and postural alignment awareness. This tube lets you experience Pilates-style resistance workouts without the heavy equipment. 4 equal length resistance tubes (2 with padded handles and 2 with foot/ankle cuffs) connect to a center nylon strap, allowing you to simulate Reformer- or Cadillac-style workouts in a mat-based setting.