Patented in 1903, the Mackinaw Cruiser is Filson's classic outdoor shirting design. Born from a partnership that goes back to the time of its inception, the Mackinsaw is constructed from 100% virgin wool sourced from the Pendleton mills, a fabric chosen for its warmth, resilience and natural water resistance. Constructed with a spread collar, rear map pocket and utilitarian multi-pocket chest set up and like everything Filson do, it comes with a lifetime guarantee.