From the website: Ra is a barefoot Oxford lace up shoe, built for easy transition from work to play. Ra is light, flexible and breathable, with a thin sole. It's made from Wild Hide leather and has a thermal insole so that your feet are protected from the elements. Great shoes, but I never wear them. Perfect for work, casual, weddings. Super comfortable especially if you are used to minimalist footwear and need a dressier shoe!