About this item 【Feel Comfortable】Designed with a 3.5 inch diameter for applying targeted pressure to small surface areas such as hands and feet,relieving soreness, discomfort and tightness,Hygienic solid construction is durable.Relieve Tension in your feet, back, muscles and fascia; target plantar fasciitis, deep tissue and trigger points. 【Clean & Hygienic】All the balls are made from pre-tested PVC material that is environmental-friendly, have no odor and leave no residue,easy to wash. 【Easily Portable】 - the balls are lightweight and ideal for daily use at home, at the office or anywhere you need them.Hard Spiky Massage Ball,outer layer offers stimulating effect, increasing circulation,Excellent tool for plantar fasciitis. 【Great Massager】Whether you are looking to relieve muscle soreness, plantar fasciitis, or do some pre or post-exercise trigger pointing, our massager is designed to deliver optimum results.our massagers are built to provide just the right amount of elasticity.That are perfect for use at the gym, at home, at the office, and in fitness centers.