Zinus 10" Viscolatex Memory Foam Mattress, Queen 2 inch Viscolatex responsive foam, 1 inch memory foam, 2 inch hdd support foam, 5 inch high density base foam, with a soft luxurious cover The foams are infused with Green tea, Charcoal and natural plant Oil for minimal use of petrol based chemical and works to eliminate odors Patented compression technology allows Our mattresses to be compressed, rolled and shipped in a box via FedEx All foam is CertiPUR-US Certified for durability, performance and Content Please allow 24-48 hours for the memory foam mattress to fully expand to its original size and Shape