15% Cotton, 85% Polyester Your mattress will expand fully in 24-72 hours. Warmer temperatures accelerate memory foam expansion, while colder temperatures at delivery may cause a slight delay. Expansion time varies with surrounding conditions. NapQueen's state-of-the-art bed mattress: the perfect solution for aches, pains, and poor quality sleep. Sleep like royalty with NapQueen's advanced bed mattress designed to leave aches and pains behind. Experience ultimate sleep with NapQueen's cooling memory foam mattress, featuring bamboo charcoal foam for unbeatable comfort and freshness. Enjoy the sleep-enhancing benefits of expertly designed bamboo charcoal foam. NapQueen's eco-friendly mattress: the ultimate solution for regal cleanliness and comfort, made with CertiPUR-US certified materials and free from harmful VOCs, formaldehyde, and heavy metals. Our commitment to your well-rested satisfaction guarantees your bed is backed by NapQueen. Your satisfaction is our top priority, and we back that up with our commitment to the quality of your bed at NapQueen.