Yes the topper does need a good 2-3 days to BREATHE! Don't make the mistake of thinking you can buy it and use it the first night. If I recall the other reviews, several mentioned that you need to let the topper unfold and AIR OUT. But once you've done that - you will not be disappointed with your purchase. I've slept on my topper for almost a year. It's GREAT. I will turn it over and move it now/then but it is holding up great. You won't be disappointed with this buy!