Smart Sleep SweetTop 8-Inch Gel Memory Foam Mattress, Twin X-Large Total thickness 8 inches open cell memory foam for cooling by Air Flow gel infused memory foam for additional heat dissipation 2 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 Every mattress purchased results in a 1-Percent of the MSRP charitable donation to Shared Comfort, our giving program Total thickness 8 inches open cell memory foam for cooling by Air Flow gel infused memory foam for additional heat dissipation 2 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