HYBRID PLUSH MATTRESS: With this king mattress, you have endless possibilities for restful sleep. You're sure to wake up feeling refreshed and restored QUALITY MADE: Packed inside are layers of support foam and response memory foam. Power packed wrapped coils support you night after night SUPPORTIVE COMFORT: High-density foam provides firmness, and memory foam offers pressure relief. A 4-way stretch cover with pillow pocket technology tops the mattress KING SIZE: Mattress measures 76" W x 79.5" D x 13" H. 10-year non-prorated warranty. Purchasing mattress & foundation from two different brands may void warranty; check warranty for details ARRIVES IN A BOX: Simply unbox, cut the protective wrap and unroll. Please allow 48 hours for your mattress to fully expand. Foundation/box spring sold separately. Adjustable base compatible