Zinus 11.5-Inch Swirl Gel Cooling Memory Foam Mattress Topper,, Airflow Design. Seeking relief from hot nights without cranking up your AC? We?ve got you covered with the Swirl Gel Cooling Memory Foam Mattress Topper. Packed with specially formulated cooling gel, this thoughtfully crafted layer regulates your body temperature as you sleep, so your internal heater gets a bit of extra help, and so does your energy bill. To really kick up the cooling factor, its surface is designed with Wave Dynamics technology that promotes airflow and banishes excess hot air. Constructed with soft and enveloping CertiPUR-US Certified Green Tea Memory Foam that lets your joints rest easily and naturally, the Swirl Gel Topper doesn?t skimp one bit on comfort or freshness. Throw in a 5 year worry-free warranty and a few hundred happy customer reviews, and you have yourself one well-rounded, sweet-dream-inducing topper. Cooling Gel Swirled Memory Foam HELLO SLEEP - LET THE AIR FLOW, LITERALLY - The ups and downs and in-betweens of this specially engineered, cooling gel-infused topper promote airflow throughout its conforming memory foam layer to dissipate heat while providing superior softness and comfort A COOLING EMBRACE - This 1.5 inch layer is constructed with supportive memory foam swirled with cooling gel; fits under any standard or deep pocket fitted sheet CERTIPUR US CERTIFIED - Highest quality foam is CertiPUR US Certified for durability, performance, and content EXPERTLY PACKAGED - Our technology allows this topper to be efficiently compressed into one box that?s easily shipped to your door; simply unbox, unroll and this topper does the rest, expanding to its original shape within 72 hours Worry-free 5 year limited warranty included; a new foam scent is normal and should dissipate within 72 hours