Sealy Slumbertime Mattress Set, Firm: * 4-way stretch knit cover * FlameGuard high loft fiber * Luxurious ultra dense poly * High strength steel coil system * Firm seating edge to prevent roll-off * 5-year limited warranty * Mattress height: 8.5" * Standard foundation height: 9" * Beds sold separately. See our assortment of beds. * Bed frames sold separately. See our assortment of bed frames.