4" Full Inches of Gel Foam with Cool Sleep Technology. Amazing Night Sleep Guarantee! Plus 4 Inches Breathable Foam and 4 Inches Base Layer for added support 100% Certifiied Organic Mattress Durable 3 Layer construction and certified by Industry leading GreenFoam Foam. This mattress is Comfort Firm Meets Federal Flamability standards 110 CFR 11033. Don’t let the price fool you. This is a higher quality mattress at less than 1/2 the price of the "big brand" mattress.