MONEY BACK GUARANTEE: We offer a 12-month warranty and a 30-day money back guarantee. To protect all customers' benefit, we hope you could keep the products and apply refund only, if you are not satisfied with them. We are trying our best to offer ORIGINAL products to satisfy ALL customers. We do appreciate your thoughtful gesture. Easy to use, remove the adhesive cover from the insert , stick the grips to any shoe back easily. Good stickiness favorable to be kept in place firmly for a long time when jumping, running and walking, etc. Volume-added with ultra soft farbic, suitable for most of the shoes especially canvas boards, sneakers, boots and flats to protect the back of heel from being rubbed. Also recommend for shoes that are 0.5 size larger. For kids and women, size 20% smaller than other heel grips which is better fit children's shoes and small-sized women's shoes.