The Ice Cloud is our coolest mattress ever literally. Back and side sleepers who like a temperature-controlled sleep environment with premium comfort layers will love the Ice Cloud Mattress. Our CoolSync hybrid mattress features layers of contouring CoolSync memory foam with actively cooling OmniPhase phase change material. According to testing by the Malouf Research Center, the Ice Cloud mattress sleeps seven degrees cooler and improves cooling rates by 10 percent due to improved temperature regulation provided by OmniPhase.* The zoned pocket coils offer targeted support to common pressure points, and the HyperChill cover offers an instant cooling effect. All Malouf mattresses arrive rolled and compressed in a box.