Happy Bull Men's Casual Buckle Loafer Slip on Driver Shoes 3 Colors 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.