From Foot Petals, the Strap Cushions feature: Includes 9 thin strap cushions Strap cushions help to reduce rubbing and keep straps from digging into skin while preventing blisters or marks on the feet and heels Slim design offers comfort while remaining discreet, can be used on straps and areas of shoe that dig into the skin, and can be easily trimmed for a customized fit Keeps straps from falling off the back of the heel for a better fit Beveled edges prevent cushions from rolling and curling with foot friction PORON® Cushioning provides superior shock absorption while being lightweight and breathable, keeping your feet cool, dry, and comfortable Adhesive backing for lasting placement, not recommended to remove and reuse Made in the USA.