These stress balls provide a firm resistance inside a sleek fabric. The innermost core is a high resistance gel which gives the small muscles of the hand and fingers a good workout. Squeeze to increase strength and flexibility of the hand, improve focus and to manage anxiety. Deep breathing while using these stress balls is also a wonderful way to relax your mind and to help relieve stress. Breathe in for a count of 5 and exhale for a count of 5. Repeat 10 times.