The Manual Massage Ball can help relieve your sore, stiff, and aching muscles, improve blood circulation, and reduce stress. Designed to reduce sore head, shoulders, neck, upper back, arms, legs and relieve foot pain, the Manual Massage Ball is powered by the pressure of your hand and uses a 360-degree spin to help you target any area in any direction you like. The 6.8 x 6.8 x 6cm massage ball is made of durable, skin-safe PP+Resin material and is small enough to fit perfectly in your suitcase, duffel bag, or drawer. Available in red, purple, green, or blue.