From OOFOS, the Men's OOcloog Clogs feature: Synthetic upper Versatile clog that brings unmatched comfort into your everyday work or leisure routine Synthetic lining Impact-absorbing OOfoam™ technology in OOFOS advanced footbed geometry Round, cupped heel designed to enhance impact-absorption and stability with every step Lightweight, flexible and packable for ultimate travel availability Machine washable, air dry Synthetic outsole Imported.