OPPO SILICONE INSOLES ALL SIZE 5401 , oPPO Silicone Elastimax Insoles provide longitudinal and transverse arch support, and help to redistribute pressure caused by body weight.The insoles use two different silicon densities, and so provide superior cushioning and shock absorption on the ankle joints, knee and hip when walking or practising sports, Insoles reduce peak loading and help to relieve heel pain and foot fatigue from long periods of standing. They fit comfortably in most shoes and are available in several sizes