SWIMS Men's Penny Loafer Athletic Boating Shoes Synthetic & Rubber Rubber sole Inspired by the original Norwegian Aurland penny loafer, these loafers from Swims are brought to a new level with added functionality The synthetic and non-marking natural rubber material allows for a good grip on slippery surfaces ventilation gills in the sole give you the perfect amount of breathability and drainage if in water Machine washable at 30 degrees Celcius in a washing bag Comes in multiple sizes