Being based in New England, we know about working in cold weather. Our Woodfort heavyweight flannel work shirts use heavy cotton for warmth that helps you power through. 8.4-ounce 100% cotton brushed flannel. Two chest pockets with button closures. Reinforced fabric under collar, at center placket and inside cuffs. Inside locker loop. Machine wash cold, Use non-chlorine bleach only, Tumble dry low, Wash with like colors. Imported.