HEEL PAIN KILLER – Designed for those who have a foot pain. Prevent shoes rubbing your feet, slipping out of shoes, relieve metatarsal pain and plantar fasciitis pain. HIGH-QUALITY MATERIAL – Made of soft and safe silica gel, high elasticity and flexibility. The skin-friendly velvet outer can prevent your feet from contacting with silicone directly. ONE SIZE FITS MOST – Moderate thickness, so it leaves room for your feet. But we still suggest you to use them inside the looser fitting shoes to avoid causing your feet discomfort due to squeezing. REPEATEDLY USE – Washable and reusable. Having a strong self-adhesive that firmly stay in place for lasting comfort. 14 PIECES VALUE PACK – Include 6 pieces free anti-friction pads. Unisex and can be worn with a variety of shoes.