The SensorPEDIC® 4-Inch Gel Swirl Memory Foam Mattress Topper features swirls of cooling blue gel that transfer heat away from your body and may help keep you cool throughout the night. Four inches of supportive gel memory foam absorb pressure and strain while cradling your body's contours and distributing your body weight for restful sleep.SUPPORTIVE MEMORY FOAM- 4-inches of gel-infused memory foam offers pressure-relieving support | REFRESHING COMFORT- Swirls of blue gel in the memory foam help transfer heat away from the body | FRESH AND CLEAN FOAM- Hypoallergenic foam helps keep your sleeping area fresh and clean | CERTIFIED HIGH QUALITY FOAM- Foam is CertiPUR-US certified to meet rigorous standards for performance, content, emissions and durability, and is analyzed by independent, accredited testing laboratories | REJUVENATE YOUR MATTRESS- Absorbs pressure and strain by cradling the body's contours and distributing body weight | 100% gel-infused memory foam fill | Imported