@beejenigma I use down filled pillows with two pillow cases. The first is a hypoallergenic zipper case, and the other is a normal sheet set pillowcase.

I use the down filled because they are more substantial and easy to squeeze and shape when needed. I just put the pillow vertically on the wedge as it slants downward. When I lie down, I make sure that my head is high up on the pillow, and the base end of the pillow is at my low back or below my hips. I like to tuck the upper part of the pillow under my neck, too. Sometimes, I double up and use two pillows on the wedge. It works for me. It took some getting used to. I also feel that it helps my sinuses.