We bought our King Size Sleep EZ organic king Latex mattress with four layers. THIS PURCHASE WAS OUR BIGGEST MISTAKE EVER. We have had our mattress for two years and both sides have sagged so much that I have to dispose of it. My husband and I both weigh less than 140 lbs each so it can't be attributed to weight.
DO NOT BUY THIS MATTRESS!!! I can't stress this enough! The return process requires you to re-box (sure!) the latex and send it back at your cost. DO NOT BUY THIS MATTRESS.