Slumberland King Size Calm Pillow Top Mattress with Affinity™ Foam, this deep, luxurious, cool and comforting. The open cell structure of the Affinity Foam enhances air circulation and breathability of the mattress. Affinity™ Foam has also been designed to offer instantly responsive comfort and optimum support while allowing you to move easily helping you get a great night’s sleep. The Calm mattress contains a unique blend of Cushion, Comfort and Support Affinity™