Ergonomic shape fits your palm and detachable strap for additional gripping options Improves core strength and functional movement; targets muscle tone and flexibility. Ideal item for arm strength training and rehabilitation Patented Neuwa material (synthetic rubber compound). Latex, PVC, phthalates, and chloride-free Compact and lightweight; great for use at home or when traveling Soft and comfortable compared to traditional dumbbells ECOWISE Super-Grip Slim Weight Ball (1 lb - 6 lbs) offers all the benefits of traditional lightweight toning without using hard-to-hold metal dumbbells. The ergonomic shape offers easy-gripping and the textured surface makes it non-slip. The attached strap adds another layer of security and it is adjustable and removable. The petite olive shape design enables a wider range of motion and more functional movements, includes mimicking football tossing motion for various sports training. Color-coded with weight level in pounds.