The most advanced pillow-cooling technology available. OmniPhase phase change material provides continuous temperature regulation with ventilation, while activated carbon infused foam moves heat away from the head and neck and a layer of OmniPhase PCM absorbs and dissipates heat. Soft, supportive memory foam relieves pressure, under a removable Tencel Lyocell mesh cover that manages moisture. Shoulder cutout shape ideal for side sleepers. CertiPUR-US certified. 5-year warranty.