IsoFlex American Stress Ball Hand Massager in Assorted Designs & Colors IsoFlex brand quality - Double-lined with natural latex for extra durability and filled with micro beads Using a premium stress ball helps to release tension in your body by improving blood circulation and the repeated act of squeeze and release promotes the easing of stressful feelings An IsoFlex stress ball can be used to strengthen hand and forearm muscles, for stress relief as well as a massage of the hand. Stylish colors and artistic designs add fun to the relaxation provided by the stress ball This listing is for a set of IsoFlex stress ball(s), randomly picked colors and designs