MB1 massage ball is covered with EVA foam, uniquely constructed in layers, made up of different densities. Foam surface mirrors the pressure a massage therapist’s thumb, addressing designated problemed areas such as calves, piriformis and pecs. The surface is very dense, yet still compresses to grip muscles tissues, releasing tightness and discomfort. This uniqueness helps in keeping blood and oxygen flow, enhancing movements without irritating nerves like a hard golf ball or a lacrosse ball might. The slip resistant texture functions best on any hard surfaces including floor and wall. The foam surface is easy to clean, more hygienic than cloth, suitable for repeated use. For optimal efficiency, place the ball directly on areas of discomfort, apply pressure and roll side to side.