The silicone insole series 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 keen, joints, and back. It helps to relieve the pain and irritation from indications of metatarsalgia, fat pad atrophy, plantar fascia, and arthritis. The blue insert is softer and can provide additional cushion to relieve the pain and pressure. The insole pad is easy to wash and suitable for most footwear.