Mulberry may be known for making brightly colored leather bags for women, but its latest release—a series of canvas-and-leather carryalls—is built for men. The five-piece capsule collection is being sold exclusively by the online retailer Mr Porter and is the first collaboration of men’s bags for the brand. The styles, which are available in limited editions of under 100, comprise a briefcase ($950), a messenger bag ($950), and three weekend duffels ($950–$1,195) in black, tan, or blue. Each piece features Mul…