We believe that a box spring or bed base forms the backbone of your mattress setup, providing a solid foundation for optimal comfort. The Zinus Spa Sensations 5 inch Low Profile Smart Box Spring Mattress Foundation, Twin epitomizes this ideal, offering a flat, level surface designed to keep your mattress in perfect condition, ensuring you sleep soundly night after night. Crafted with durable steel, this box spring offers easy assembly and comes with a poly jacquard cover that complements your bedroom decor. Zinus beds are expertly packed into a box and are backed by a 5-year limited warranty to ensure you sleep soundly.