Worn only once. I usually wear a size 23.5, but I accidentally bought a 24 (38). I bought them in a hurry because I needed them, so I wore them for a few hours with insoles in the heel area. When I removed the insoles for the listing, some adhesive remained. Please refer to the images. Therefore, I recommend wearing insoles only in the heel area when you wear them. Otherwise, they are in good condition with no stains.