This design features a patent pending Genuine Grip slip resistant rubber outsole with superior grip and a side zipper for comfort wear. It has a shock absorbing polyurethane mid-sole. It also has a Walking On Air removable polyurethane footbed with moisture absorbing Dri-Lex fabric moisture absorbing mesh lining and oil & water resistant. This design is ideally suited for professionals who tend to stand all day on hard surfaces possibly with water or oil. It s perfect for nurses doctors chefs teachers and retail store or restaurant employees.