Since the winter weather has hit, I have been looking for flannel-lined pants to keep me warm since I spend a lot of time outside. Unfortunately, I am not willing to pay the money ($50+) for a pair of pants that are only going to get dirty during farm work and day work. So, I made my own.
You can take a look at my tutorial here:
Flannel-lined Pants Tutorial
Note: You will need some sewing experience to make these.