Sleep Science is a brand of mattresses manufactured by South Bay International. They are, for the most part, sold by Costco. The Sleep Science brand includes mattresses and pillows, as well as adjustable beds. The mattresses are Emma, Ara (Vela), Dream, and Black Diamond. Other South Bay brands are Advanced Sleep Technology, ViscoKidz and MotionTrend (adjustable beds).
Here is South Bay International's description of themselves:
South Bay International has been a trusted strategic business partner to many high quality bedding retailers since 1993. We are an OEM manufacturer of products for some of the world’s largest mattress manufacturers and retailers, and the only American based company with its own 700,000 square foot foam factory in Jiaxing, China. As an OEM manufacturer of visco-memory foam products, we partner with our customers to create customized products to meet their market needs. Our 100% pure visco-memory foam mattresses, toppers and pillows are behind some of the most recognizeable brands in the industry, as well as our own adjustable bed base and foundations. We are experts at supporting our customer’s private labels.
As far as can be seen at the present time, South Bay International has only one Sleep Science adjustable bed model, Motion Trend. It is mostly sold through Costco.