THE PROCESS: Replacing our 15 year Spring Air (SA) "Four Seasons" cal-king mattress was a task my wife did not want me to undertake; however, I was beginning to have back pain, and a 100% latex mattress seemed to meet my needs, and the ECO our price point. Upon arrival, the UPS driver and I carried the box from his truck to our entry door. Unboxed, I rolled the mattress upstairs and placed it on top of our SA luxury wrapped steel box set. Unrolling the mattress from its plastic, I pulled the ever expanding roll back to bed center pushing each exposed layer of plastic underneath the mattress until it sprung open unfolding itself in 2 seconds (watch out) on the box set. QUALITY: No odor, the mattress has a good quality side zipper cover. So extremely firm, even the top 2" soft layer is virtually unnoticeable. After 2 weeks sleeping much cooler on the latex than on our SA wool cover, my wife, a back sleeper, said she was very happy; for me, a side sleeper, I found my back pain had slipped away, but I began to awake with my arm(s) asleep. Unable to find a cal-king latex topper at O, I found a 2 soft latex bamboo cover topper for $249 shipped out of AZ - try searching latex bamboo topper. We have slept happily since 100% latex for under $1000.