※ I purchased this as a spare, but I no longer wear heels, so I'm selling it. These insoles for high heels were developed based on the results of Dr. Howard Dananberg, a leading American podiatrist, who analyzed the symptoms of many women he had examined! Insolia is recognized by the American Podiatric Medical Association for promoting foot health and has been issued a certificate of approval. Its effects are reputed to be "like magic," and it is used by many women around the world who suffer from the pain of heels. No stains, tears, or odors.