TRIPLE-LAYER DESIGN: 14" mattress with 2.5" premium Suretemp memory foam, 2.5" support foam with ventilated airflow, and 9" sturdy base foam for durability and edge support FRESH, CLOUDLIKE COMFORT: Hypoallergenic design keeps your sleep space fresh. Advanced Suretemp memory foam provides pressure relief and motion isolation for undisturbed sleep BREATHABLE SUPPORT: Premium air channel foam creates breathable support to help maintain an ideal body temperature while you slee JUST RIGHT FOR EVERY TYPE: Whatever your sleep position or body type, the medium feel of Shiloh provides all-night comfort that leads to all-day energy CALIFORNIA KING MATTRESS TOPPER: This 4-inch mattress topper features a dual layer of quilted fiber fill and gel memory foam. Personalized, luxurious comfort for all night support. TWICE THE COMFORT: For the ultimate upgrade, get twice as comfortable. Enjoy the pillow-y comfort and lightness of 2-inches of quilted fiber fill, plus the all-over support of a second 2-inch layer of gel memory foam. COOLING GEL MEMORY FOAM: Our gel memory foam is specially designed to ensure you stay cool all night. Drawing heat away keeps you at an optimal temperature for a full night of undisturbed sleep. WASHABLE COVER: Comfort that’s convenient – our easily removable, machine washable cover means your topper stays clean. And the snug fit holds everything in place.