Alvantor 2/3 Inch Cooling Gel Memory Foam Mattress Topper for Back Pain Relief,3 Inches,Twin

This topper requires 48hrs laid flat to expand to its true manufacturer thickness so be patient. After a few hours it seemed fine yet I allowed the full 48hrs and it looks fine now. I purchased the 2” and I must say I'm surprised with it as it is intended to be used on a new Comhoma 72” convertible futon also ordered to extend the life %26 comfort of the futon %26 have guest with a good nights rest . I tried it out and had a wonderful full nights sleep paired with a bamboo memory cool pillow was amazing. Hopefully my guest will also have the same experience. As far as the fishy smell other consumers mentioned, mines did not have it at all. Upon my first smell I noticed a very light, light foam material smell not chemical foul order but like popcorn foam packing almost but my sense of smell adjusted/overcame it which I didn't noticed as I sleep. Comes with a 3 year from purchase warranty with proper normal use %26 care. I couldn't be more happy with this product. Hope your experience is as mi es.