DESIGNED BY MR PORTER. The philosophy behind our Mr P. line is simple, once you've got the wardrobe basics down, everything else falls into place. This black rollneck sweater, for example, will become the foundation of so many outfits. It's been knitted in Italy from 12-gauge merino wool and designed in a slim fit that's ideal for layering. Wear it with: Officine Générale Trousers, Mr P. Jacket, Mr P. Sneakers, Mr P. Socks.