Material - The heel cups made with high quality medical-grade soft silicone which can prolong the wear resistance. If necessary, gently clean the heel cushion inserts manually with mild detergent.Heel Pain Relief - Premium heel cups for heel pain inserts provide exceptional support for the heel and ankle, reducing pain, fatigue and swelling. Our silicone heel protector very suitable for those who are at the foot all day.U-Shaped Heel Protection - The U design of the heel pads can protect the heel and keep the curve of the lower limbs when walking, so as to protect the feet and prevent ankle sprain.Suitable For Any Showes- The comfortable gel heel cups can be used for most shoes, including sports shoes, formal shoes and boots, with or without socks. If necessary, plantar fasciitis inserts can also be worn in socks.