It's flannel, so you know it's going to be soft and warm. But the yarns in the Excavation are hollow-core, making them more thermally efficient than ordinary yarn, so keeping the chill off becomes easier. Also, the polyester has moisture-wicking technology. So this is a flannel that's also a performance shirt, ready for hard work or relaxed leisure.Models shown are 5'9" to 5'11" tall, wearing size S/4 or L/12.