The silicone heel cup is made of medical grade silicone material. The silicone will maintain soft, pliable and can provide long lasting support for the foot. It's friendly to the skin and odour free. It can absorb the shock by walking and running, and reduce the impact on the heel, joints, and back. The blue spot insert of heel cup is softer and can relieve the pain and pressure on the sensitive area, plantar fascia especially. The slight sticky surface can keep the inner place of the shoe firmly. It also effective to relieve the pain from indication of knee and back pain, fat pad atrophy, heel spurs. The heel cup is easy to wash and suitable for most footwear.