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. Perfect top layer supports your bodyweight & maintains your body shape to rest in the best condition.I-Gel disperses temperature accumulation to maintain a constant mattress temperature High density foam prevents defection of memory foam