I made one for my stepdaugther. I pieced the top and then I put a cotton backing on it and kinda made it like a pillowcase, where you just put the down comforter in from the bottom. I had about 1/4 of the bottom sewed close on each side and left enough room in the middle to insert the comforter. I then used velcro closures on the bottom so the comforter wouldn't fall out. Once you had the comforter in it and all the way up to the top corners and fluffed it pretty much stayed like that.