The 10 Degree Rule

Dress for runs as if its 10 degrees warmer than the thermometer actually reads. To put it another way, dress for how warm youll feel at mid run not the first mile, when your body is still heating up. This means choosing the right apparel. See the Dress for Success table On cold days, the new soft shell tops and tights are light, warm, and breathable, says Emily Walzer, fabrics editor for Sporting Goods Business Magazine. On warm days, wear a lightweight performance fabric next to your skin, which will disperse sweat through evaporation. The Exception Theres a limit to how many clothes you can take off without getting arrested, so if its in the 70s or warmer, wear minimal lightweight, light colored apparel.