15 miler on thin hard pack snow on a cold clear day in Park City. Incredible blue bird day. PureFlow was just fine in terms of traction on everything except the steeps. Don't think it will be great on ice. I now have about 300 miles of wonderful injury and soreness free running on my first pair of PureFlow. Soon I will get a new pair and outfit this pair with roofing screws for winter all terrain running.
Happy Holidays and Happy Trails in 2012!