DESIGNED BY MR PORTER. Mr P.'s 'Peter' loafers sit somewhere between smart and casual, so you know they'll slot seamlessly into your everyday rotation. They have streamlined suede uppers and rest on sporty rubber soles. Wear yours with tailored trousers and jeans alike. Lower Impact Materials. This product is made using at least 50% lower-impact materials or ingredients. Find out more about our Consciously Crafted criteria here.