This is one of the most comfortable shoes I've ever worn! They are beautiful, so soft on the inside like they were sewn onto my legs. Although the soles are some sort of plastic I think polyurethane but I left them in the sun for a day and the chemical smell dissipated. These soles are the best shock absorbers when walking. All in all, I can't think of a more comfortable shoe, let alone sneakers. Can only recommend this shoe!