The mesh material provides good breathability and a comfortable fit, adding a touch of casualness to your style. ・Only the heel has a core material, so it feels soft on your feet. ・The insole is cushioned. Upper material: Polypropylene, Polyethylene Sole material: Synthetic sole The size is S, which I believe is equivalent to 22.5cm, as I am a 22.5cm. I've worn them twice. There's no noticeable wear on the heels, but please check the photos. The actual item is shown in the second photo onwards. Please understand that this is a used item. Shipping method may change from Kururaku to Yuyu. No smokers One small dog - Color: Black - Size: S - Material: Mesh design - Style: Flat shoes Thank you for looking.