Nice flannel, note light weight
I recently purchased the Barton Creek and the Twin Lakes plaid shirt jackets. The Twin Lakes is really thick, the Barton Creek not so much. Would wear it as a "jacket" that you can wear indoors. Outside below 40, not recommended.
It is very nice, well made and fits me well. I'm 6'-2", 228 lbs, and normally wear 35" sleeve. Fits my shoulders perfectly. Sleeves just long enough.