Ultimate Dreams 13-Inch Copper Gel Memory Foam Mattress, Twin Experience the health, support and anti-microbial properties of copper with the comfort and support of gel memory foam. Constructed with 3" of Copper Gel Memory Foam over 10" of a double convoluted high density core to increase air flow and comfort. Compressed and rolled for easy and convenient parcel shipping and set up. Please allow up to 24 hours for mattress to expand and potential odor dissipate. 10 Year Warranty, Proudly Made in the USA