One size fits all. Peel n' stick. Improves shoe fit and comfort. Guaranteed to stay in place. Airplus Heel Liners are designed to improve the fit of your shoe while providing added heel comfort. The foam cushions your heel and helps reduce heel slippage. Adhesive backing secures the liner into place inside all shoe types for all day comfort. The Airplus Promise: If you are unsatisfied with your purchase, we offer a 30-day money-back guarantee. We also promise a 1-year warranty against manufacturer defects. Simply return this product to the address on the package with the original receipt for a full refund. Please allow 8-10 weeks for processing. We stand for comfort. airplusfootcare.com. Please recycle. Made in USA.