Hi fuzion,
There are more online mattress toppers that can be returned appearing in the marketplace, but you’re correct that few companies allow a return of such items, as the comfort they offer is greatly determined by the surface upon which they are placed. While the online offerings are constantly changing, here is a list of some online toppers with return policies of which I am aware. It’s at least a good start. And as you’re already aware, returns on many of the products in the “ultra-premium” price ranges are not common.
Phoenix