Cotton is a fiber (from the cotton plant). Flannel is a finish or weave. Hence you can have flannel wool as well as cotton flannel - i.e wool made with flannel finish or cotton made with flannel finish. Hope this helops.
A very memorable song from Joni Mitchell that featured the line They paved paradise and put up a parking lot.. This best described places I remember growing up in Bloomington, MN in my teens where numerous places were torn down, most notably a restaurant I frequented that was replaced with a Park and Ride lot.
And a big yellow taxi Took away my old man Don't it always seem to go That you don't know what you've got Till it's gone They paved paradise And put up a parking lot They paved paradise And put up a parking lot Â© Siquomb Publishing Company