The TheraBand Mini Ball is a small, lightly inflated exercise ball that is excellent for core and overhead exercises. This product is an ideal option to be used to strengthen key muscles for rehabilitation or fitness purposes, and for use in Pilates, yoga, or rehab. This ball features an elastic, slightly textured surface that is designed to not slip when placed against hard surfaces. Each ball includes a full list of exercises included to target the hips, knees, core, and back.