SweetTop 10-Inch Gel Memory Foam Mattress, Split California King Total thickness 10 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 (not a zippered up bag of foam) For use on box spring or foundation bed Made in the USA Meets Federal Flammability Standard 1633 and CertiPUR-US Certified Foam Standards Made in the USA, 100% satisfaction warranty, free shipping 1% of MSRP donation to our mattress gifting project so help us as we surpass more than 30,000 gifts given since 2008 Total thickness 10 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