A Semi-Flex® foundation is a bed base constructed using a sturdy wooden frame and a steel non-flexing grid. The purpose of the foundation is to raise the mattress’s height, making it easier to get in and out of bed and to create a flat and firm structure for the mattress to lie on. A Semi-Flex® foundation will extend the life of your mattress by providing the adequate support needed. With the increasing height of mattresses, you have the two height options that will not affect the support of feel. A Semi-Flex offers a steel wire foundation combination which is better than all-wood alternatives because it’s stronger, lasts longer, and doesn’t squeak or crack like wood does over the years.