The Cambridge mattress combines the gentle support of BonnellTM innersprings with firm poly-foam paddings. A soft 2″ pillow-top provides additional pressure-point relief to side sleepers while maintaining a firm feeling. This classic combination creates a dynamic sleep surface that satisfies a wide variety of body types – never too soft for adult bodies, but not too firm for petitie and youth sizes. The Cambridge is one of our best-selling mattresses for guest beds because of its versalility, and is popular with couples looking for a long-lasting bed without the bells and whistles.