Place the Bedge on top of, and near the head of your regular mattress. (It will also work on water beds!). You may cover it with a regular sheet to match your bedding (folding the sheet around it like wrapping a package), or use a fitted crib sheet which will cover the Bedge snuggly. When ready for sleep, position your head a few inches from the top of the wedge. You will be most comfortable sleeping on your back or side. Trying to sleep on your abdomen will be difficult! Your own pillow can be placed under your head for added elevation and comfort. That’s why, when it comes to acid reflux disease / heartburn treatment, we say: Start with the Bedge, and stay with it!