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. Convoluted layer provides better ventilation and disperses body pressure.Suits all kinds of sleepers. Had foam - supports you back-line strongly.