Vissco Extra Heavy Physical Resistance Flex Active Band Black is used for strengthening particular muscles and joints. It is a complete progressive resistance exercise program that may be used to help increase muscle strength, endurance, flexibility and exercise performance. Various colour bands allow you to monitor your fitness or therapy progress under the different resistance levels. | Uses: The resistance bands are used to build up the strength and provide a smooth stretch that will not lead to any jerk or injury. Product Specification and Features: Easy-to-use, versatile, and convenient, can be used in the clinic, at home, or on the go It improves endurance and balance training Muscle strength training for concentric, eccentric and isolated muscle contraction | Directions For Use: Read the label before use. Safety Information: Read the label carefully before use Store in a cool and dry place away from direct sunlight Keep out of reach of children