Create just the right amount of resistance with the ideal workout tool that you can use anywhere, anytime, in just minutes a day! All you need is a little space to begin a safe, effective total body conditioning program. The patented (U.S. Patent No. 5,800,322) Xertube® offers progressive resistance levels for multiple uses and fitness levels. Allows for isolation of targeted muscle groups and full range of motion exercise. Ideal for group exercise, personal training, and traveling. *prices vary by resistance.