This mattress focuses on all-night coolness and undisturbed rest, with targeted features to enhance sleep quality. Its Cool-Touch Fabric uses conductive yarns to actively move heat away from the body, preventing overheating, while the Copper Cool Memory Foam does double duty-drawing excess body heat and absorbing pressure to cut down on tossing and turning, helping you sink into deeper sleep.It also delivers a comfortable, light feel thanks to the Hi-Definition Transition Layer, which adds a buoyant, weightless sensation when you lie down. Plus, the 740-individually wrapped Dynamic Edge Coils virtually eliminate motion transfer between sleepers, so your partner's movements won't disrupt your rest. Together, these elements blend cooling, comfort, and motion isolation for a more restful night. Size: medium.