I discovered a set of tights made by Bellwether that have a thick lycra with a fleecy lining and a wind-breaker fabric over the front. I don't know how much more rip-resistant they would be but they sure keep you warm and you feel like you're protected. They're called Windfront tights - I wouldn't wear them in anything but the coldest weather. The other tights I like are Terry's Coldweather tight. Pretty wooly feeling and tough but very breathable!