✪ STAY COOL ALL NIGHT LONG: Avenco premium 12 Inch california king mattress is designed with gel-infused foam with open cells so that it's ventilated to meet your needs. Gel foam naturally adjusts the mattress temperature to make you sleep comfortably while reducing sweat and perspiration during hot or humid weather. ✪ BETTER SUPPORT AND PRESSURE RELIEF: The double airflow wave shape layers provide better ventilation while dispersing body pressure. Our high-density base foam relieves pressure points and conforms to your body, providing unparalleled support during the night. Suitable for side sleepers and stomach sleepers. Say goodbye to Back pain. ✪ SLEEP SOUNDLY WITH AVENCO MEDIUM PLUSH MATTRESS: 2 plush layers of memory foam create a plush and comfortable sleeping surface for a more restful night's sleep. The breathable and skin-friendly mattress cover provides increased comfort. ✪ THE LATEST IN SLEEP TECHNOLOGY: 4 layers of CertiPUR-US foam for a safe and healthy sleeping environment. 3 inches Gel Memory Foam, 2 inches Comfort Foam, 3.5 inches Airflow High-density Foam, and 3.5 inches Airflow High-Density Base Support Foam. Please allow it 24-72 hours to expand its full size. Sizes are subject to ±0.5 Inch. ✪ BUY WITH CONFIDENCE: Finished with a warp knitting fabric cover, this luxurious 12 inch california king mattress is compressed and smartly shipped in a box for convenient delivery and setup. You have 100 nights trial and covered with Avenco 10 years support.