Happy Bull Men's Casual 2 Eye Lace-Up Slip on Driver Shoes Black Tan Red (Mucci-01) Synthetic Rubber sole MATERIAL: Synthetic upper. Rubber outsole for better grip and traction. STYLE: Moccasin hand-stitched upper. Classic slip on driver shoes style for walking, driving and casual wear.. DESIGN: Simple timeless moc-toe driver slipper shoes, designed with superior flexible outsole. COMFORT: Light padded insole provides support and cushioning. SIZE: Mens standard width sizing.