The pilates toning balls by SISSEL increases the range exercises. Pilates exercises can easily be adapted to use, light weight to increase core control. It is used in shoulder rehabilitation to retrain and stabilise muscle groups. It focuses on increasing strength, stamina and flexibility in arms, shoulders and upper torso. Toning balls are soft non-bouncing toning balls. The balls are 9 cm diameter and the only available color for this equipment is blue. One can choose from two weights, either 450 and 900 grams. The toning balls are only sold in pairs. The toning balls inside have an inert filling.