Mattress covers are crafted from a soft, quilted cotton material. Features a support systems with individually wrapped, heat-tempered coils to minimize motion transfer. Center coils combined with quantum-edge coils provide edge-to-edge sink-into support for extra comfort and less back and joint pain. Plush mattresses feature 4 of 1.5 density foam and have a 15 ILD rating. Pairs perfectly with our Premium 8 Box Spring or Premium 2 or 4 Platforms. King features 1136 coils. Queen features 932 coils. Full features 778 coils. Twin features 590 coils. Rotating mattress periodically is recommended. Plush mattresses are one-sided and do not need to be flipped. Mattress protectors are recommended.