If you want to do something good for your planet and good for your body, the last thing you should consider buying is a Toxic Memory Foam Mattress.
I will give you the information here and you decide if Memory Foam Is Toxic or not. Which of these chemicals do you think cause cancer? Do you want to sleep on them and find out? Not me!
All I can say is we don't have time to go down this deep dark rabbit hole. You can if you want to spend the rest of your life researching this. My life is to short and I can tell you 1/3 of your mattress contain harmful chemicals. That's how bad it is.
Here is a great research article already written about the safety of flame retardants. HealthandTheEnvironment.org.