I use sheets just about always. Many years ago, I was given some "insulated" draperies-the ones that were rubber backed. My daughters and I wanted to create a nice picnic blanket and we used the draperies for the filler. It sewed beautifully and was a very good barrier from moisture from the ground and washed great. We created another for the bed that was in the coldest room without heat and it was the warmest bed in the house! One of my daughters still has the bed quilt but the picnic somewhere along the lines grew legs and walked away.