【4 PAIRS HEEL CUSHIONS 】Thick  insert is reduced by about 1/2-ish of sizes, suitable for loose shoes and prevents the heel from sliding out of the shoe. Thin insert is reduced by about 1/4-ish of sizes, suitable for slightly loose shoes and prevents heel blister. 【NO TOOLS ARE NEEDED 】   Heel Cushions have an adhesive backing that keeps them in place. Remove the adhesive backing and place the pads on the inside heel of shoe. It can be easily put on and off when you don't want to use it. 【DESIGN UPGRADED】: Designed to fit the contour of shoe heel. It is made of soft sponge, making it highly elastic, flexibile and reusable. There are gel dots on the cushion, thus preventing your feet from slipping out of your shoes