I've waited a few weeks to leave this review.  Since then, I've taken them though Death Valley desert trails, mountain snow covered trails, and some slight rock climbing.  They were comfortable right out of the box.  They have remained comfortable on all trails.  My feet did not get soaking wet in the snow trails (didn't realize I'd be treking through 8 inches of snow).  They have great grip.  I'm definitely going to get another pair when I wear these out.