4.3 Cloud9 Twin XL 4 Inch 100% Visco Elastic Memory Foam Mattress Topper 20 Year Limited Warranty Direct From Cloud9 Bedding Visco Elastic Memory Bed Company Exclusive formula makes you feel like you are floating on CLOUD9, sailing forth into a sea of dreams Made in the USA, does not contain any toxic ingredients, new foam odors will disipate if aired out.