I made a bed skirt for my queen size beds years ago. I used an old bottom sheet over the bottom mattress, added velcro on 3 sides. When I made my skirt I added the other piece of velcro to it so all I had to do is attach it using the velcro. I made my skirt is 3 separate sections as it was 3 layers each so lots of fabric. When it comes time to wash it, all I had to do it pull it off the bottom mattress and wash. Getting ready to make a new skirt but box style instead of gathered. Using the same fabric for the border of the quilt as the skirt too.