Part of the next generation of our workwear, Mountain Ops, built on rugged tradition and state-of-the-art innovation. This shirt definitely lives up to that legacy. It's our beefiest flannel, in a heavyweight polyester/rayon/spandex blend for extra warmth, durability, and mobility, and brushed for maximum comfort.Models shown are 6'0" to 6'2" tall, wearing size M/32x32.