All of them, I don't believe they serve any to the net of society and probably harm more individuals than protect.. YMMV like everything, flame retardants are generally just like PFAS, they are forever chemicals. The mains ones used up until the 2000-2013s were PBDEs, these bio-accumulate just like PFAS. THe EU and US have switched to alternatives but I don't believe these to be any better, just newer.