These are NIKE CORTEZ BASIC SL GS in white/black, size 23cm. They have been used several times, and the soles are worn down as shown in photo 5. There is a permanent black mark on the front of the left shoe (see photo 5). It's a stain, like ink, and there is no indentation. The lighting is orange, so they appear yellowed, but they are actually white. Price is not negotiable.