Cosmopolis Collection Queen Size Platform Bed - by Stellar Home Furniture - S200-4: The Cosmopolis Collection Queen Size Platform Bed has a strong presence, with clean, bold lines and a rich, dark espresso finish. This modern bed offers a nice alternative to traditional bed frames, requiring only a mattress for a minimalist look, while still ensuring ultimate comfort. The structure features laminated engineered wood, designed to last for years to come, with a full board base for extra stability and support. No box-spring needed.