Thank you for viewing. This is a pair of NIKE Alphafly 3, size 25.5cm. I am selling them because I am replacing them. The total running distance is about 80km, including one full marathon, one half marathon, warm-up runs, and practice sessions. The uppers are not noticeably dirty, but the soles show signs of use. In particular, the black rubber on the heel of the left shoe has partially peeled off, so it has been reinforced with adhesive. Please refer to the photos. Thank you for your consideration.