The LoosenUP ribbed firm-density roller has a unique triple zone design that mimics techniques from a professional massage therapist. The deep ridge isolates troublesome trigger points with pinpoint accuracy. Dig deep with a variety of massage techniques to release muscle knots and stiff areas to release tension and improve your mobility. The mediumridges are beneficial for stretching and squeezing muscles longitudinally or transversely, which can aid in increased circulation to help improve performance and recovery. The narrow ridges are ideal for massaging smaller areas such as hands, feet, and forearms.