Each bed, sold as a mattress and box spring unit, is manufactured by Sealy exclusively for Marriott International. The JW Bed may be purchased online at the CuratedbyJW.com store or by calling their Concierge Service. You may certainly request the mattress only however, the mattress only may feel firmer without the box spring. If you choose to order only a mattress, they recommend placing it on a firm surface such as a platform bed.