Malouf Ice Cloud 13" Activair Hybrid Mattress 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 ActivAir™ hybrid mattress features plush, ultra-breathable ActivAir™ foam coated 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.