Sleep Innovations 3-inch Gel Memory Foam Mattress Topper with Air Channels and Cotton Cover, Made in the USA with a 10-Year Warranty - California King Size CALIFORNIA KING MATTRESS TOPPER: Drift into a sounder, deeper sleep on this 3-inch cool gel memory foam mattress cover ideal for side, back or stomach sleepers. MATTRESS COVER: A snug-fit cotton cover keeps everything perfectly in place, can easily be removed and is washer-and-dryer safe. GEL MEMORY FOAM: Add cooling comfort to your mattress with this gel mattress topper crafted with an air-channel design that facilitates air flow to keep you cool and comfortable all night long. COMFORT & SUPPORT: The California king size memory foam mattress pad evenly distributes body weight to reduce painful pressure points for unbeatable comfort and support. MADE IN THE USA: This Sleep Innovations mattress topper is proudly made in the USA, vacuum packed for easy shipping and handling and comes with a 10-year limited warranty.