The Katy Professional Clog features an easy to clean synthetic upper. The aerocushion technical insole, with it's heel cup and metatarsal pad, offer firm, superior support. It's lightweight construction provides superior comfort. The steel shank provides arch support while the enhanced toe room and goring allows for added comfort and easy on and off. The leather-lined heel construction enhances durability. For added stability, they also feature a US Certified Slip-Resistant outsole.