Stay comfortable and warm in this soft, heavyweight 9 oz., 100% cotton button flannel shirt from the original Five Brother shirt company. Tuck it in for a great every day, casual look or wear it untucked as a lightweight shirt jacket. Five Brother brand began making shirts in 1890 and is back with this authentic, high-quality, heavyweight flannel shirt that has been redesigned with a fuller cut and 3 - 5% shrinkage.