Soft weights are used for strengthening, balance training and mobility exercises. Fitness Mad Soft Weights offer a more fluid and natural range of motion than standard dumbbells, in a safer design which reduces the risk of injury if dropped. All Fitness Msd soft weights are also of a standard size, offering a consistent grip as you progress from lighter to heavier weights. Specifications: 12 cms diametre PVC outer shell with sand filling Phthalate-free Supplied as a pair