The Modern Box Spring Your traditional box spring redefined, meet the modern version of your mattress support made with heavy duty steel and a fabric cover. This sturdy foundation is made with 100% steel frame and slats to provide maximum support and durability while helping distribute weight evenly. Convenient Covers Our 9-inch box springs come with a fabric cover with strong elastic straps that make it easy to secure on and remove off the box spring. The cover also has a non-skid center to help your mattress stay in place. High Profile The 9-inch-high profile design allows for better shock absorption and ventilation to help extend the life of your mattress. Sturdy Steel The heavy duty box spring is made with 100% steel for the strength and durability to support and distribute weight evenly. Easy Setup Our box spring can be set up in minutes with easy assembly and fits with standard bed frames, ready to support your and your mattress.