I would suggest a Reinsman Tacky Too backed pad. They have a sticky neoprene waffle weave foam that sticks to their back. Some people have had it stick too good that it starts pulling on some hair. Mine works great, no pulling issues. I've heard you can take an old sheet, cut it to size and put it between the back and the pad. They are moderately priced, about $80-100 and stick well. Nice thickness and you can get it in a contour shape. The contour shape keeps the pad in position.