I had the antimicrobial mattress topper for 3 years, loved the comfort, but it all changed after a skunk sprayed our backyard, and the smell got into the house, and in the foam… I tried everything from vinegar, to animal smell removing products, to heavy wash and rinse in the sunlight, but the skunk smell never disappeared, and I am left with no choice but to throw it out. Extremely disappointed in that conclusion, considering the price of the product. I guess that’s why they call it memory foam…!