The core of any mattress is its support system and most mass-market mattresses feature variants of an 80 year old design. While these spring units may have been dandy during the great depression, they don't offer the consistent, edge to edge support for your body. Sherwood® mattresses feature an innovative open coil design that provides up to 21% more support than conventional mattresses. And if you're looking for enhanced individual support, some Sherwood® mattresses feature our luxurious pocketed spring coil system. This design allows each spring to respond independently to the shape of your body to improve conformance while virtually eliminating sleep-disturbing motion transfer.