The North Face Women’s Isotherm L/S is a merino wool hybrid shirt for cool weather runs. The Isotherm is part of The North Face Flight Series, where it’s all about running and training hard. The main part of the shirt is comprised of merino wool, to keep you warm. Then FlashDry panels are placed under the arms and along the back. These are the spots where you create the most heat and sweat, the FlashDry wicks that away from your body and dries you out quickly so you can finish your workout strong.
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