I have a memory foam bed in our upstairs but wanted a top for our downstairs because I am having back surgery. When I rec'd I opened up and there was absolutely no odor to it. I let it "breathe" and put on the bed. It is so soft and conforms to our body. It is a great product. My only complaint is I bought the 3 and 1/2" height and it has made the bed higher. The mattress cover it came with went over the topper and fit well under my mattress. Glad I purchased.