THERABAND Resistance Band 25 Yard Roll, Super Heavy Silver Non-Latex Professional Elastic Bands For Upper & Lower Body Exercise, Physical Therapy, Pilates, & Rehab, Dispenser Box, Level 7A superior band product for resistance training and rehabilitation, provides both positive and negative force on muscles and joints, stretches tones and conditions all major muscle groups Improves strength, range of motion and flexibility in a simple to use, portable product that works in the clinic, the gym, at home or on the road Color coded Progressive Resistance system allows users to recognize improvement as it happens, as you grow stronger you