Does a tight-top mattress develop body impressions?

Tight-tops tend to resist deep body impressions better than pillow-tops, because there is no thick, soft pad on the surface to compress first. The comfort materials are integrated and usually more stable underfoot. Some surface settling is still normal over years of use and is not a defect. Keeping the bed on proper support and rotating it where the design allows helps wear stay even, so the flat surface holds its shape over time.