The Garfield Family, which owns and operates Flip Mattress, has been in the mattress industry for nearly 50 years. We’ve learned what does and does not fail in mattresses. Coils are the least likely part of a bed to give you a body impression. Foam is the most common source of mattress sag. Flip Mattress lets you maintain that foam through rotation and flipping, while the coils support your body day after day, and night after night.