Men's Buckhorn Insulated Snap ShirtStraight up flannel only goes so far in a Wyoming winter, which is why our Buckhorn adds 100% recycled polyester Thermore Ecodown synthetic insulation. Lofted by locationwith more fill in the body, less in the sleevesthe organic, brushed cotton flannel rolls loose but packs tech warmth underneath. Worn over a tech tee, hoodie or even another flannel, it fires up outdoor rated warmth during backyard bonfires, parking lot tailgates or campground jam