The TNP Accessories foam roller is a long cylinder made of foam with higher density and stronger foam built to last. It is approximately 33cm long x 14cm in diameter. Your body weight is used to provide pressure when lying or sitting on the foam roller. Rolling your muscles along the foam roller help break up adhesions that form on your muscles, much like a massage. The foam roller, which is ideal for using on hard to reach areas, provides more relief and benefits than simple static stretching might.