>>1973888I still use one just for the sleeping bag, but it’s really not necessary and literally serves no purpose other than keeping my sleeping bag separate from everything else. Day 2 of 10 on this last trip, there was 2” of rain and nothing got wet inside. Eventually I had to end up cutting my pack liner (trash bag) in half and Duck tape it into two ghetto trash bag hip waders to cross an icy, swollen river. Worked splendidly (seriously)