Polo Ralph Lauren Men's Bienne Boat Shoe 100% Leather Synthetic sole Heel measures approximately 0.5" The leathers used are a rub off sort, there is always going to be color variations as that is part of the uniqueness of the process. Polo Ralph Lauren crafts the quintessential boat shoe with traditional moc-toe stitching, leather lacing at the vamp and collar and a rubber sole for great traction.