This may be helpful for you: 1, Shoe sole must be clean and smooth. Please wash your shoe sole carefully with water, then wait for the shoe sole to dry before you apply the pads on it. Otherwise it may reduce the stickiness of the pads to the shoes and to falling off. 2, Please follow the installation instructions. Mistaken installation may to a failure or falling off. 3, As a matter of experience, If floor is over wet or oil, it may reduce the effect of this shoe grips. 4, Vigorous exercises such as running at an intense level may also reduce the effect of this shoe grips. 5, The sole pads are thin enough to be noticed when you apply it to your shoes. 6, If your shoe have self-nonslip function, you don't need them.?Wide Application?: Fit for various type of shoes. such as leather shoes, working shoes, sandals, heels, canvas shoes, casual shoes, etc. If the width or the shape does not math to your shoes,you can easily cut with scissors. ?Noise Reduction?: The shoe grip was made of soft silicone which avoid direct hard contact between the shoe and the floor, stopping shoes from making a loud "clonking" noise when you walk. The high quality silicone also reduce wear and tear to prolong the service life of the shoe grips. ?Non-Slip Design?: The shoe grips on bottom of shoes can prevent you from slipping and falling anytime you are dancing, walking, partying, etc., avoiding embarrassing situation, improving the non-slip. ?How to Use?: Please clean the part on your shoes where you need to stick the anti slip shoe pads, then tear off the bottom paper of them and stick them on that particular part of your shoes and press firmly. ?Strong Adhesive?: The inside of our no slip shoe grips are made of strong self-adhesive material which is not easy to come off. They can stick to your shoes all day long and you’ll never worry about slipping or falling off.