Let me start off by saying that I am so happy I purchased this Cool Gel Memory Foam Mattress! Shipping was so fast and easy. Once I receive it I did exactly what the instruction said. After laying it out for 24 hours it was ready to go on top of my bed. All I can say is this mattress topper was a breath of fresh air. It was so comfortable and it helps my back pain so much. My husband loves it too and with him having multiple sclerosis it helps with his pain. I am so happy I purchased it and would tell anyone to purchase one too!