In the heart of O’fallon, across from the Wal-Mart, neighboring Panera, Qdoba, Jimmy John’s and Monicals, Mattress Direct O'Fallon displays the entire Simmons Beautyrest and Serta iComfort catalog, as well as the Relax-O-Pedic and Campbell Mattresses which are proudly made in Missouri. Mattress Direct always guarantees the lowest price on every mattress on display. Don't pay retail. You save money when you order your Mattress Direct. Come in and let one of our dedicated Sleep Specialists help you find the mattress that best for the way you sleep.