Underarmor gear is much better made than the crap at Wal-mart, K-Mart, Target, etc..... How do I know, I own both, because I thought they were the same thing and they are not. The underarmor works much better for me and the other stuff I will use until it is worthlessly worn out, but the UA stuff is much better at keeping me warm.
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2007 Jamis Ventura Comp
2006 Jamis Explorer 2.0
2000 Specialized Hardrock (bought used)
Swim, Bike, Run and sounds like fun