A trimmer fit with built-in stretch An everyday staple with a heritage of hard work–built with Filson’s legacy of rugged durability. Sporting a 5-pocket, slightly-trimmer cut, our Muleskinner Jeans are stitched in the USA from a tough, cotton-blend denim with slight give for comfortable ease of motion. Metal shank-button waist closure and double-layer pocket bottoms. Zipper-fly.