Paul Smith Leather Folio Bag. The PS By Paul Smith Black Folio Bag combines style and functionality, perfect for easily carrying your essentials. Made from premium cowhide leather, it offers a sleek design with practical features. Key features: Black | Cowhide Leather | Top zip closure | Adjustable, detachable straps | Signature stripe design | Composition and care: 100% Cowhide Leather | Clean with a damp cloth. Shop the Black Folio Bag from PS By Paul Smith in Black at Miinto. If you are not satisfied, you can return your items free of charge within 14 days.