General Note: Please allow 24 - 72 hours for your Mattress to regain its full shape. Any memory foam will expand faster in a warmer room. In cold temperature, at delivery, your mattress may take a bit longer to return to full sized from its compressed state.The expansion time of the mattress will vary as per the surrounding..Set Up: Simply take your mattress out of the box and enjoy watching it decompress. Jumping, walking, and sleeping on your mattress can speed up the process. 10 inch hybrid combines the traditional support of an innerspring mattress with the plush comfort of hypallergenic memory foam for a medium feel.A thick layer of memory foam conforms to your curves to help eliminate pressure points and increase comfort Compressed and shipped in a box for convenient delivery and setup, this universally comfortable mattress makes relaxing easy Available in a medium firm 8 inch profile, a medium 10 inch profile, or a plush 12 inch profile that also features gel infusions and individually encased coils Packaging process may leave small brown flecks called carbons in the mattress packaging; These carbons are harmless pieces of plastic and will not stick to your mattress; 10 year limited warranty