Stretch N Strength Flex Bands wrap around the body or body's extremities to produce natural and healthy ranges of motion and variable-resisted-active-isolated-stretching. Stretch N Strength Flex Bands Bands have been proven effective for flexibility workouts, injury rehabilitation, and weight training. Strength gains can be achieved by attaching the Stretch N Strength Flex Band to free weights or manipulating them around the body for resistance. 41" lay down length (82" circumference). 3/7th Level Low Resistance Band (3/16" thick, 1 1/8" wide and 30 - 50 lbs. resistance)