I bought this ventilated mattress foam topper because I have back pain and need good support but I also get hot easily at night and needed a good mattress topper that wouldn't get too hot. When I got it, I it took some work to get it out of the packaging, it was air-vacuumed and cold, but once I got it out of the packaging and laid it out to air out, it fluffed up rather quick. After the the topper had fluffed up and air out, I put it on the bed and once I laid down, I did not want to get up. It is so comfortable!!! Because of the ventilation, it doesn't trap your body heat so it stays nice through the entire night. It has made a huge difference in the quality of sleep I get with this topper. I can't sleep without it now! I highly recommend this!