The Beautyrest BR800 Full 9" Foundation by Simmons is a flat mattress foundation designed to add height to your bed or extend the life of your Beautyrest mattress. This foundation features a durable spruce framework combined with welded steel elements for superior support and stability.

Available in all standard bed sizes, this foundation is specifically engineered for full-size mattresses. The construction meets or exceeds State and Federal Fire Retardancy Standards when used independently or paired with an approved Beautyrest mattress. The foundation provides the perfect base for the Beautyrest BR800 mattress line, offering reliable structural support while elevating your sleeping surface.