Cando 2-layer round foam roller, 6″ dia. X 30″l, black, x-firm cando 2-layer foam roller is 6″ round, high-density core with 1-1/2 outer comfort and firmness layer. Outer layer is available in 3 levels and is color-coded to indicate firmness. The roller can be used for rehab exercises for upper/lower back, calf, hamstring, gluts and more. It is designed for pilates, core, abdominal, back stabilization and strengthening routines.