TheraBand Tubing with Handles are made from high quality natural rubber latex perfect for upper & lower body exercises conditioning & rehabilitation and are a great alternative to free weights & dumbbells. The included handles or cuffs make it easy to use for a variety of upper & lower body workouts. TheraBand Professional Latex Resistance Tubing is available in 7 color-coded levels of resistance. Different resistance levels are determined by thickness of the tubing. Proper use of these systems for resistive exercise provides both positive and negative force on the muscles improving strength range of motion and cooperation of muscle groups. Color-coded progressive resistance gives at-a-glance documentation of progress from one level to the next. Not Applicable