Perfect for all ages and both men and women improve step balance and foot strength anti-skidding, shock-absorbing and depressurizing reduce the damage to the foot due to vibration relief pressure and pain from shoes. Manufactured from high quality Silicon material. These silicon heel cups are Suitable for leather shoes, sports shoes. It can be easily washed by hand with a mild detergent when necessary. Before placing it in your shoe ensure there is adequate space in your footwear to accommodate the insole.