This looks to be just another ordinary quilted mattress pad, but it's not. The 400 thread count cover is made using RELY antimicrobial fiber! Patented Rely® polyester fiber fill, which is the only EPA-registered material with anti-microbial properties and thus prevents odor-causing bacteria to fester on your bed. With the combination of the stay clean feeling Rely® fiber, the support and functionality of a 400 thread count cotton corded edge cover, and the price point that you expect from pillows.com, you can get the restful night you need and wake up feeling fresh.