Do you know what kind of leather safest? I think they tan that stuff with all sorts of things. I haven't dove into that yet.When you think of a jacket, this is something you will wear OFTEN, therefore, it is a worthy investment to pay more money for one of safe materials, higher quality - buy it new and not from a DUSTY thrift shop
Any polyester jacket is automatically 24/7 stress, the jacket LITERALLY DRAINS your body of electrons and turns you into an energy vampire
Polyester is THAT BAD - all clothes are stressful and the best way to do it is no clothing at all but if you have to wear clothes then for jackets - wool and leather are best