oh Yes do they put rocks in these new covers ? they seem to get heavier as the night progresses and push right on the toes, there is a device you can get called a bed cradle it fits in at bottom of bed and you put the covers over it so it holds them up, some pharmacies sell them or occupational therapist's,
if your at all handy you could even make one its really just a U shape only on its side, bottom bit under mattress then covers over top bit.(well actually 2 U's with a bar across the top)- sorry if descript
ion is off.
even shoving pillows at bottom of bed can lift them a little