After letting this mattress topper unfold, I tried using it but it was impossible. The smell was so strong I had to get up in the middle of the night and strip my sheets to remove the topper. Everything had to be washed. The smell made me nauseous, burned my nostrils, gave me a stuffy noise and ant one point I was wheezing slightly. I aired it out for over a week, but the smell remains. The topper is really comfortable for me, so I decided to keep it, but I can't wait until it gets warmer so I can air it outside. I can't help but wonder if there are any health risks associated with this topper because of the outgassing.