85% Wool 15% Polyester Blend Sport Coat

No, I can accept the lining's fabric being man-made, but not the body.
You just get to find hard on sales, or save up a bit.

I am not sure that a small percentage of polyester is the "kiss of death".
However, it is my impression that jackets which are made with this fabric are
generally of lower quality. Not because they contain this fiber but because cheap
clothing is largely where it is used. One of the first suits that I bought myself decades
ago was sold to me by Roland Meledandri. It was an Ivy style tweed and conatined
some polyester. An except of my post in SF, a few years ago, referring to him is below:

The late and sainted Roland Meledandri, a major influence in high-end menswear in the 70s
till his untimely death, wore four button suits during the Ivy League style era in the late
'50s -60s. At the time he worked at the pioneering clothiers, Calsual Aire and Men's Town
and Country in Greenwich Village and later the East Side, where the merchandise pushed
the "Ivy" envelope. He also sported a magnificent handle bar mustache. I had one of his
tweed suits. It only had three buttons.