The Williamson Mattress by Southerland Bedding is a quality handcrafted mattress. At the core you are supported by a foam encased innerspring unit, designed with improved perimeter support and better surface coverage. Layers of Super Soft Foam create a plush sleep surface, while a luxurious stretch-knit cover provides flexibility at the surface and contributes to the overall sleek look of the mattress collection. At the end of a busy day, stretch out and enjoy a restful sleep. A good bed for a side or back sleeper.