Flexible hourglass design wraps around and compresses muscles while rolling, to relieve soreness and speed muscle recovery Slim handles for easy control and leverage pressure for stress relief Foam spindles individually roll across muscles to provide a comfortable massage and increase circulation Engineered for user controlled pressure to massage lower and upper body muscle groups, including calf, hamstring, quadriceps, and back Dimensions: 19.5 L x 2.5 W inches