So I ordered the silver flannel. From the pictures it looks silver and black, but it's actually a grey with blue and lime green stitching.
Sizing is good and accurate. I got a large 5'11 175lb.
The outside is cotton, but pretty rough to the touch.
It's super heavy duty and thick. It doesn't flatten out if you try to pack it in a bag.
The hood comes off which is nice.
The sherpa lining sucks. It's 100% polyester and feels like house insulation. It's rough and after 10 minutes of wearing it made me feel like I had fiberglass in my skin for about 3 hours afterwards. No shit. I tried to wear it a few times to see if it would soften up/ shed but I can only stand it for about 10 minutes before it comes off. Still no change in how it feels since the day I got it.
If the sherpa lining was wool or soft cotton it'd be a good tough outdoor flannel but since I can't even stand it, I gotta send it back.