Half Foam Roller - Ideal for Physical Therapy, Exercise and Balance Training, 1/2 Foam Roller Half Round Design, 18 Inch Length, BlueOPTIMAL FOR SELF MASSAGE: The Body-Solid Tools half foam roller is an excellent aid for self-massage, especially for the upper and lower back, hip, ab & adductors, calf, hamstring, glute and quad muscles. It can also be used as a back roller for back pain, making it a great choice for those seeking relief from muscle tension and discomfort.