Buy with Comfidence: Dear customers, if you purchase is too wide or small, you can feel free to order a smaller or bigger size for yourself again. If you received an item in used condition please don't send a complaint, message us and we'll solve any problem! Our customer service staff will certainly give you a satisfactory solution. Anti-slip & Lightweight: The bottom of our shoe lifts is non-slip design, which fits your heel strongly. Wear them for a period of time, the heel lifts can orthodontic your feet. They are lightweight that you hardly feel their weight, they are not as bulky as traditional height increg insoles, they are feather-light and fit comfortably on your foot, allowing you to feel at ease at all times. High Quality Adhesive Glue & Comfort Heel Lifts: Our heel lifts made with durable material and strong adhesive glue, they will not easy to deform and fall off after long-term use, and they can remain as stable as possible during using. Provides enough cushioning for the heel, sweat-absorbing fiber surface can be washable(for a longspan using, please do not wet the adhesive of the heel lifts), breatheable memory buffer material, all day comfort. Adjustable Height Design: Include 3 removable 1/4" thick layers, a total of 0.71inch, easy to adjust your ideal height according to your need. Perfect U-shaped design provides shoe fits. Fits most of your shoes, you can apply them into your shoes, such as sneakers, leather shoes, canvas shoes, boots, etc. They can be used for multiple pairs of shoes as well, the adhesive glue used in our products will not remain on your shoes, so you can easily replace them with the shoes you want. Design for Leg Length Discrepancy & Pain Relief: SIIHEA heel lifts design for leg length discrepancy, help prevent heel pain and knee pain and relieves heel spurs, arches, ankles, legs and back pain. Easy to help you to solve your foot pain problem, such as, achilles tendinitis, plantar fasciitis, sports injuries, heel discomfort, etc.