Graphene cooling technology and copper infusion for temperature regulation and pocketed springs for flex support. The Onyx is sleeker, thinner, and firmer than the other two models in the Onyx lineup. It has a Cooling Knit Cover and utilizes the paring of Copper Gel AeroFusion™ Memory Foam and Flex Support Foam to provide the sleeper with support, isolate them from motion, and align their pressure more evenly.