The Cambridge Box Top stacks plush comfort on serious support. A layer of 100% natural copper-infused Talalay latex delivers contouring pressure relief, backed by Energex hybrid foam that blends memory foam softness with latex-like resilience, plus high-density foams built to stay comfortable for years. Underneath, an 8-inch PowerEdge Elite fabric-wrapped spring system reduces motion transfer and reinforces the edges, while a steel coil perimeter keeps the surface consistent from side to side. The E-Cool cover's thermal comfort technology absorbs excess heat for a cooler night's sleep, and the whole build is adjustable-base friendly. If you like a cushioned, cradling feel without giving up support, this is the one to stretch out on.