there is a whole ~science~ on beds. For me, I was having trouble sleeping....and I was so desperate to find good sleep, the mattress was getting ruled out as the factor. I even did something I never would consider (acupuncture) and it actually helped. As a matter of fact....it actually turned me towards that moreso than traditional medicine at times.

Anyhow, I went through every bed manuf I could find to find the perfect bed. For me, which Hastens was the last option since they were $$$, but the freaking horsehair bed topper was the winner.

Never did like the way memory foam slept. Heat retention was such a issue.

FWIW, in my research, there was ALOT of bedding enthusiasts the make their own bed. There are places online that sell various foams, and basically they end up making their own *foam bed* with a mix and martch of hard foams layers, and soft foam layers and or *zoned* areas in which certain parts of the body rested on a harder foam vs. softer....

I feel for you on this one. I don't have back issues myself but I work damm hard during the day enough that I know what good sleeping can bring.
Sorry if this doesn't answer you warranty question though.