Coincidently the wool/synthetic blend isn't a new concept. That is what Patagonia's wool has been (75%-25%), I believe from the beginning.
I just checked my Patagonia 1/4 zip top and it's "100% wool, exclusive of trim." It feels like it too. Great top for the money IMO.
FWIW, with any wool garments (tops, bottoms, socks, shirts, whatever) that have a "wool percentage," I give them a mental letter grade based on their percentage of wool. Less wool in the the blend means its less of a wool garment. Woolrich for instance makes most of their stuff with 85% wool. I then factor in the weight of the garment, and decide if 85% of that material would make a decent 100% wool garment that's 15% thinner. Kind of a SWAG, but WTH. Things like socks need some synthetics to stay together and hold their shape, so I aim for a minimum 70% Merino with them. Everything else I want 100% wool if I can get it. Just my .02c.
