Foam mattresses are great since you are sleeping on a cushion of air. Comprised of millions of tiny cells, each cell holds the air that keeps you afloat and comfortable. Unfortunately when crushed into a box 1/4 it’s original size, millions of  bubbles break. Yes it will pass the 100 day test but is that enough for your hard earned money? We don’t think so, so we ship and install full sized for your comfort.