This is a real wood-choppin', horse-loggin' kind of flannel shirt - you'll be hard-pressed to find a brawnier one anywhere else. It's densely woven 8-oz. 100% cotton flannel, with deep back pleats plus free-moving Armpit Gussets for ease when reaching or swinging. Big chest pockets to hold gear, plus bigger buttons. Paul Bunyan woulda liked one like this.