BLACKROLL TWIN is a combination between the best features of the BLACKROLL STANDARD and the DUOBALL 12cm. With the cutout in the middle the TWIN is ideally applied on the back, because it relieves the spine while rolling. In comparison to the DUOBALL the points of contact left and right are wider. The weave of the material in the mid-section stimulates the skin and the tissue, especially while applying on legs and arms.
