Unique GEL DOUGH memory foam brings you comfort and support. The GEL DOUGH formula produces a superior, softer foam that is still firm enough to support the natural curves of your head, neck, and shoulders. This pillow's GEL DOUGH memory foam has been molded, not cut, making the pillow more effectively conform to your weight and pressure for individualized comfort. Memory foam captures body heat to collapse the structure of the foam, allowing it to mold around your body. DOUGH memory foam already uses an open cell formula to minimize heat retention, but this pillow takes it one step further. Cooling gel material was infused into the memory foam to create a cooler memory foam that keeps the benefits of the advanced GEL DOUGH formula. The gel captures and distributes body heat for a cooler night's sleep. Rest assured knowing this pillow is safe for you and the environment. The memory foam in this product is CertiPUR- US certified which means it has been independently tested for content of materials used, physical performance, and environmental stewardship. Careful construction guarantees no prohibited phthalates, no ozone depleters, no CFCs, no mercury, no lead or heavy metals, no formaldehyde, no PBDEs, and low emission (VOCs) for indoor air quality. The memory foam is naturally resistant to allergens and dust mites. This pillow includes a super soft velour cover made from a rayon from bamboo blend (75% polyester, 25% rayon from bamboo). The cover is moisture wicking, temperature regulating, and easy to remove for laundering. The pillow and cover are backed by a 5-year warranty. King size pillow includes one 35