Thera-Band® exercise bands provide positive and negative force on the muscles, improving strength, range of motion and cooperation of muscle groups. They are used in yoga, Pilates, stability, balance, birthing, and rehabilitation exercises. They can also help restore muscle and joint mobility. Color-coded progressive resistance gives at-a-glance documentation of progress from one level to the next. Different resistance levels are determined by thickness of the band with color-coded levels increasing in difficulty from tan (Extra Thin) to gold (Max). This comprehensive system provides positive reinforcement and feedback for gauging results. Thera-Band® resistive exercise systems cost much less than other exercise equipment sold with claims of achieving similar results, plus they are portable and versatile with virtually unlimited uses. Recognized and used throughout the world, Thera-Band® exercise bands are endorsed by the American Physical Therapy Association (APTA). Our individual Thera-Bands® are sold in 6' long pieces. You may also purchase Thera-Bands® in 150' rolls, which is long enough for 25 six-foot long bands.