Arm hula hoops are designed to strengthen arm and shoulder muscles. The arm hula hoop is small in diameter, so it is easy to control the hula hoop through your arms and provides an upper body workout. Arm hula hoops are useful for all users, and can be shaped and stretched to the skin. One box per pair of arm hula hoops. - Material: Processed Foam - For All Ages - Design Features: Foam covered pipe hoop. - Dimensions: Diameter: 35cm - Weight: Actual Weight: 3.3kg