I made some flannel on one side & knits on other (was cleaning out stash).Theu need to withstand very hot water. I chk with home & they wanted longer to go down towar laps. I made mine about 3".. Had some inexpensive flannel & it shrunk unevenly I can get 2 from 1yd of fabric.. Made plaid flannel for the guys. I had borrowed a basic pattern (shorter) from home & just lengthened it