Maybe I'll be asking for some wool base layers for XMas! I'm guessing that whatever is added to that Columbia poly shirt will wear out whereas the wool won't. Just a guess though.
I presume the same thing about the anti-stink component wearing out before the fabric wears out.
I also found some charcoal impregnated clothing, made from bamboo charcoal that is fused into polyester clothing, that claims to be non-funking. But at $75 for a shirt I was not going to pop for that test.