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.  This 1.5 inch layer is constructed with supportive memory foam swirled with cooling gel; fits under any standard or deep pocket fitted sheet. Highest quality foam is CertiPUR US Certified for durability, performance, and content. Product Dimensions: 74 x 53 x 1.5 inch.