Made of durable gel for superior cushioning, the heel pads are anti-odour and non-toxic.The material is easy to clean and washable. Use warm water and hand soap to clean them and air dry.If you have heel pain arising from heel spurs or sprained foot, this flexible heel wraps gently stretch to accommodate most foot sizes and can be worn beneath socks and hosiery or over top of them.The pads are sweat absorbent and non-slip. You can wear the gel heel pads without shoes or inside loose-fitting sneakers. Simply, apply your favourite lotion on the heels to speed up the relief from cracked heels.