Long, flat bands made of natural rubber latex Extra long for added exercise versatility - can be knotted Designed for optimal functional movement and range of motion of the upper body. Surpass your fitness goals with the TRNR Physio Band X-Heavy - our most challenging flat resistance band. Ideal for high-intensity workouts that build power and sculpt the body, this Physio Band comes complete with an exercise poster to target your shoulders, back, chest, biceps, and triceps. Engineered with latex layer technology, it delivers both durability and smooth elastic resistance.