If you sleep warm, the PolarCarbon was made for you - cool and crisp to the touch, with a silky Tencel cover that wicks away heat and moisture as soon as your head settles in. Underneath, the materials do the work. Carbon-infused memory foam helps draw heat away from the body, while ColdCore phase-change material absorbs and releases warmth to hold a comfortable temperature through the night. A breathable Activent band keeps air moving so the surface stays fresh. It keeps you comfortable, too: the foam core contours to your head and neck for cushioned, pressure-relieving support. You fall asleep more easily, sleep more soundly, and wake feeling fresh and rested.