Smart Sleep SweetTop 12-Inch Gel Memory Foam Mattress, California King Total thickness 12 inches open cell memory foam for cooling by Air Flow gel infused memory foam for additional heat dissipation 3 foam layers European Faux Pillow Top style fully constructed mattress for use on box spring or foundation bed cover is a Cotton/Rayon streth knit Meets Federal Flammability Standard 1633 and CertiPUR-US Certified Foam Standards Made in the USA, 100% satisfaction warranty, free shipping Join Us-Includes your free enrollment in The Shared Comfort Experience Every mattress purchased results in a 1-Percent of the MSRP charitable donation Total thickness 12 inches open cell memory foam for cooling by Air Flow gel infused memory foam for additional heat dissipation 3 foam layers European Faux Pillow Top style fully constructed mattress for use on box spring or foundation bed cover is a Cotton/Rayon streth knit Meets Federal Flammability Standard 1633 and CertiPUR-US Certified Foam Standards Made in the USA, 100% satisfaction warranty, free shipping Learn more about SweetTop mattresses at sweettopsleep.com