Maison Margiela Airbag Lace-up Shoes in Black, with a heel air unit, are Derby shoes. Air sole Derby Size 41 (approx. 26-26.5cm) I purchased these new myself and have worn them about 10 times. Please understand that these are used items before purchasing. Also, I am a private seller and store the items at home. I will ship as soon as possible, but please note that there may be delays due to business trips or other circumstances.