The Simba Hybrid Mattress has been specifically engineered with a unique combination of foam and patented conical pocket springs to provide the optimal sleep support and comfort. Featuring Simbatex synthetic latex foam for gentle support and a cool feel, 2500 unique conical pocket springs that individually adjust as you sleep, and Visco memory foam that conforms to your body's unique shape for luxurious individualized comfort. The Simba Hybrid mattress engineering and construction is the product of extensive testing with data from The Sleep to Live Institute, whose research is based on profiling more than 10 million people and 180 million body profile data points.