I am disabled and spend 16 hours a day sitting upright in my bed and the other 8 hours flat, sleeping. My last mattress (not that old) had developed a sink hole from sitting all day. This mattress does not compress at all! It took some getting use to...it was like sleeping on the floor. I had an expensive king size latex mattress topper that I cut to size to fit the queen. Then purchased a lofty mattress pad to hold the topper in place and now I sleep like a baby. I like that it is double sided and can be flipped or rotated to increase wear.