This heavyweight flannel is woven with a slubby yarn so thick that it’s normally used for making 10oz denim. The yarn is rope-dyed a very dark blue using a method loosely known as dropout reaction dyeing which helps to better keep the color. As the yarns gradually fade, the overall pattern and look of the shirt will evolve and change. With a non-brushed interior , and will give you many years of fading enjoyment.