I admit I was a little skeptical after unfolding the sheet and seeing that the bottom was only a series of straps. I thought the sheet would twist or turn off in the night. Surprisingly none of us have done it yet! However, I do have one "thermarest style" pad which is mummy shaped and the sheet really doesn't stay put. So I have purchased a set of the snap buckles for this pad and use it without the sheet and snap the quilt directly to the pad. So far the glue is holding but I only have one nights test so far.