For surface softness, many manufacturers quilt the ticking to soft urethane foam of varying thicknesses. A variation is the pillow top mattress which has a big pillow of soft materials sewn over the entire surface of the mattress. As the name implies, it just isn't quilted. The oldest method of holding the ticking and the filling materials together is by button tufting. Button tufted mattresses will have regularly spaced buttons showing on both sleeping surfaces.
Mattress sizes differ because people are different sizes and have different sleeping requirements.
If the mattress is lumpy, hammocked out on the sleeping surfaces, if the edges are soft and offer little support, if the bedding is too short or too narrow you have probably kept it and the foundation too long. Replacing bedding often for continued good health and physical fitness is highly desirable. A new set of innerspring bedding with new innovations in design and manufacture that are implemented each year can give you and yours a new outlook on life. For many reasons, stores and knowledgeable salespeople enthusiastically recommend innerspring mattresses and matching boxsprings. Only innersprings, because of their uniqueness of construction offer the full range of subtle firmness and buoyance differentials that will make customers more than satisfied with their purchase.