Turns out you'll need a doctor's prescription to even order a plain cotton mattress. Yet another perfectly reasonable regulation from our friends in the California Legislature! :)
My least-favorite CA regulation has to do with eye-glasses. I lost my only pair and went in to get a replacement on a Saturday, but I couldn't because my (perfectly fine) prescription had expired. I had to make an appointment to get an exam in order to get new glasses, but they were closed for the weekend and booked for a few days.
So I spent about a week with headaches because some CA legislator decided it was in my best interest to pay some practitioner to get the same prescription for glasses every year.
I'm not disagreeing with your message, I'm disagreeing with the delivery.
 cf. http://www.tob.state.tx.us/tobrx.htm
Contacts do require one though.
Don't know if the company is just skirting regulation or if it doesn't exist, however.
I would call them more right-wing conservatives (neo-cons really).
(Oh my god, we sound like a couple of shills.)
Alternatively, you can order one of the cotton/latex/wool mattresses that don't have any flame retardents. The most popular is Naturepedic. However, such a mattress will set you back $2200 for the most basic queen.
What I wonder: Is it illegal to make a bed out of flame-retardant free cotton balls?