If you are looking for a warm flannel, one good option would be the one produced by Bathing Ape. The construction of this flannel is what impresses me the most, it will keep you warm (when layered properly) but is still light enabling it to be layered. The signature ape is displayed at the bottom of the shirt but the most interesting thing about the shirt is the elbow patches that the picture does not reveal, it is of the signature ape, which is a very cool detail.
-style note-
The BBC flannel features the astronaut as the elbow patches.
SoHo
