Light, performant, and dependable. Not much more to say than you'll never have to touch 'em after you install 'em. I've bashed plenty of rocks in corners, and they still keep going like the day I got 'em.
These are pretty good tights for winter running. Zipper placement around the ankle was a little uncomfortable and the waistband was more constricting than other's my wife tried. Otherwise, the fit is true to size.