The Filson Jac-Shirt has provided versatile warmth for nearly five decades. As a heavy shirt, an overshirt, or an insulating layer under a rain jacket, its flexibility has made it an outdoor staple. This version is made with a wool blend that increases durability and reduces drying time while maintaining wool’s renowned insulating ability, wet or dry. The chest-pocket buttons are hidden beneath the pocket flaps to avoid snagging. The front and adjustable cuffs secure with durable buttons. For an all-purpose layer in the widest range of weather conditions, our Jac-Shirt’s versatility is unmatched.