New Sealy Optimum Duo Chill Twin XL Mattress for Sale Retails $2100 Plus 80"L x 39"W x 10"H Foam Core with Duraflex Edge, No Innerspring 2" of Exclusive Duo-Chill OptiSense Advance LQ Memory foam. Duraflex Edge Technology. 1" of Exclusive Duo-Chill Optimax foam. 7" Exclusive Liquid Gel Opticore. Exclusive OptiCool Gel foam. 250-714-3890