The Jac Shirt from Filson is made with heavyweight breathable, insulating, naturally rain-repellent Mackinaw Wool for a truly durable overshirt. Outer back pleats enable a range of motion through the shoulders, and the collar stand and adjustable cuffs are lined with flannel for added warmth. 

• Naturally rain-repellent heavyweight Mackinaw Wool
• Fully lined with soft cotton flannel in the body
• Poly-twill sleeve lining
• Outer back pleats for range of motion 
• Collar and cuff lined with soft flannel 
• Two chest flap snap pockets
• One interior right chest pocket
• Straight hem 
• Snap placket

Materials: 26-oz. Mackinaw Wool, 8-oz. cotton flannel 

The following measurements are for size medium: Chest: 48" | Sleeve: 36.5" | Length: 29"