Editing Box-spring (section)

== History ==

The first rectangular spring-cushioned wireframes to support mattresses did not have wood rims or cloth covers. These were called ''bedsprings''. More and more box-springs are made of wood and then covered in fabrics. Wood makes a better support system for the newer memory foam and latex mattresses. The newest design in box-springs is the folding box spring, which is made of wood or metal and then covered in fabric that can fold in half and be sent by shipping and courier companies.<ref>{{cite web|url=http://www.xconomy.com/boston/2008/03/05/invention-machine-and-the-case-of-the-boxed-up-box-spring/|title=Invention Machine and the Case of the Boxed-Up Box Spring|work=Xconomy|date=5 March 2008|access-date=14 June 2015}}</ref>

With the increasing height of mattresses, manufacturers now make box springs in different heights so that the mattress and box spring pair maintain a standard height. Standard "high profile" box springs are {{Convert|9|in|cm}} in height, whereas "low profile" box springs are between {{Convert|5|and|5.5|in|cm}}. Changing the thickness of the box spring and mattress requires revisions to the mattress and box spring coil stiffness. This is often why box springs and mattresses are matched and sold in pairs.