Gel soft balls are used for hand exercise in various hand muscle weakness conditions like Rheumatoid arthritis, paralysis of hand, hemiplegia etc. They help you in performing easy hand and finger exercises for improving range of motion, increasing grip strength, lessening joint pain and relieving stress in your hands and fingers. The inside of the ball is filled with a silicone-based gel, sometimes infused with glitter or micro beads for an enhanced tactile feel. Some gel feels squishier and softer, while other gels have a semi-solid feel and offer more resistance.