The TriggerPoint MB1 Message Ball offers direct tissue relief for quick relief from your daily lifestyle. This massage ball is 2.6 inches in diameter, 1.2 ounces, and includes a unique dense EVA foam surface which will help compress against the tissue, encouraging blood and oxygen flow. The surface of this ball is easy to clean, plus can be thrown into the wash so you can enjoy a hygenic rolling experience. This ball is ideal for targeting small muscles like calves, piriformis, as well as pecs. The TriggerPoint MB1 Message Ball is a great solution for all your daily post-workout needs!