Singletracks.com says "Pearly’s are my go-to mountain biking socks."

 Check out the AWESOME review on Singletracks.com 

http://www.singletracks.com/blog/mtb-gear/review-pearlys-possum-socks/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+singletracks+(Singletracks+Mountain+Bike+Blog)&utm_content=My+Yahoo

You have to love these lines from the review..."I got within 15 feet of the ugly beast, he stopped, turned toward me, and made a horrible hissing noise while baring his long, pointy fangs..." 

"Pearly’s are certainly the warmest and best I’ve found for winter riding–so maybe possums aren’t all bad after all."