TheraBand are ideal for home exercise programs and a great way to add variety to a workout routine. They provide constant tension on the muscle - which sometimes is not possible with the free weight exercises. These bands are made of latex rubber. Each band provides with different level of resistance. Different resistance levels are possible by combining them. TheraBand resistive exercise bands are portable and versatile with virtually unlimited uses. Recognized and used throughout the world, they are endorsed by the American physical therapy association (APTA). This retail packing of 5 feet is cut from a bulk roll.