From the manufacturer: Clove shoes are designed for people on the front lines of healthcare. Easy to clean Fluid-resistant Endlessly comfortable All Clove shoes models have been certified as slip resistant, according to ASTM F3445 standards. Our Classic collection runs true to size, so you should fit into your regular size comfortably. If you typically wear wide width shoes, we recommend going up a half size in this style. Weight: 10oz per shoe Heel-to-Toe Drop: 10mm Heel Cushion: 36mm These shoes are made of Clarino™, which is a microfiber fabric that mimics real leather. As such, they'll stretch slightly over time and mold to your feet for increased comfort.