Serta iComfort Savant Plush Memory Foam Queen Size Mattress 3" KoolComfort memory foam and 2.75" Cool Action Gel memory foam with MicroSupport gel beads, which gather in the areas of your body that need extra support so your muscles relax and rejuvenate, will help you experience fewer pressure points, toss and turn less and wake up with fewer aches and pains Quilt layer is a 67% polyester, 31% rayon and 2% lycra blend that provides a comfortable and luxurious sleeping surface for a great night's sleep ComfortLast foam core helps support your body throughout the night, promoting a more restful nights sleep Open cell structure and MicroSupport gel combine to dramatically increase airflow and whisk heat away from your body so you can sleep cooler and more comfortably Cool Action Gel memory foam is antimicrobial and dust mite resistant so you can sleep healthier and breathe better"