The Black Pearl Collection, from Diamond Mattress, gives you a premium quality mattress at an affordable price. Each coil is individually wrapped allowing independent movement for a more precise support of your back or hips and shoulder filling the gaps and keeping your spine strait. These coils are encased with a high density foam giving you a firmer edge and maximum surface use. Layers of comfort foam includes Copper Cool Memory Foam. This Copper Infused Foam disperses heat while providing pressure relief. With a moisture wicking cover, you'll sleep dryer and wake up fresh every morning.