ALL OF THE ABOVE...! We recently moved stuff around from guest rooms, etc., and I had 2 extra king size mattress pads, the ones that go under sheets on top of the mattress. In great shape. I washed them very well, then cut off the white fabric going around the 4 sides and have used part of one as a filling for a child's quilt. It worked out perfectly. By the way, the sides I cut off, I trimmed and folded and use them for "samples" in my machine embroidery.