From Marc Nolan, the Men's Calum Pebble Leather and Mesh Penny Loafers feature: Pebble calf leather and cotton mesh upper Slip on construction Calfskin leather lining Latex Memory Foam padded insole Leather/Rubber outsole Imported. Sizing Notes: Size 6 to 11 run large, go a full size down. If you wear a half size, size down. Size 12 to 16 run true to size.