This was described as medium firmness. I can’t imagine trying to sleep on anything harder than this mattress. It’s like lying on a brick sidewalk. I have been sleeping on it a week and just ordered a mattress topper to see if I can make it livable. I give it 1 star for comfort because I suppose it is better than no mattress at all and I gave it a second star because it appears to be extremely well made. Unfortunately, the primary material seems to be concrete. If you like sleeping on a bare hardwood floor- this is the mattress for you!