A 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. Simple & easy to use product for upper & lower body exercises that can be performed anywhere, is ideal for conditioning & rehabbing muscles. Color-coded Progressive Resistance system allows users to recognize improvement as it happens, as you grow stronger you can move up to the next color. Highest quality natural rubber latex resistance bands are recognized as the original system of progressive resistance for over 40 years. Each band measures 5 Foot long X 4 Inch wide and comes in three color-coded resistance levels: Yellow-3-4.3 lbs.; Red-3.7-5.5 lbs.; Green-4.6-6.7 lbs.