The CrocsRx™ Relief nursing clog is made of Croslite™ a lightweight, cushioning material that provides a custom fit that conforms to your foot. It has side air portals that will keep your feet cool and dry. It?s got the Seal of Acceptance from the American Podiatric Medical Association (APMA) for allowing for normal foot function and promoting good foot health. It has an ultra-soft toe box, and a shock-absorbing sole. These shoes are also odor-resistant.