Mellow's Ace of Base is a box spring without the frills, re-imagined to meet the needs & desires of today’s consumers. A novel minimalist design for simplicity, engineered for intuitive set-up and optimized for effortless delivery. Ace of Base is a GOOD DESIGN® Award winner, presented by the Chicago Athenaeum for the most innovative and cutting-edge industrial, product, and graphic designs produced around the world. Our easy assembly metal platform bed frame features heavy duty steel construction with metal slat support for stable and comfortable support without the need for a traditional box spring. The 9-inch low profile modern design allows you to easily get in and out of the bed and leaves more height space to add extra profile with a mattress thickness that you prefer.