I have not heard of "wool power".  Have been wearing merino wool for several years now and love it!  Wear it in the BW, for cold football days (like today) and whenever I need a base layer.  If it gets warmer I am never uncomfortable in it.  Never gets clammy and sweaty, never seems to get smelly.  Not the least bit itchy.  Far softer and more comfortable than cotton or even silk.

Pricey, worth every penny in my opinion.  Spartan1 switched over recently and he agrees, I think.  He will wear his today, too.

I watch "Steep and Cheap" and get it when it is on half-price.  

I switched over to Merino wool socks for winter wear all of the time a few years ago after finding how comfortable they were on trips, now I wear them three seasons 100%.  Gave all of my cotton socks to Goodwill.

Baaa!   ;D