The North Face Men’s Isotherm ½ Zip is a warm running shirt for winter long distance running and training. The Isotherm uses body mapping to regulate your temperature during cold runs. The chest and shoulders are wind resistant, to block wind gusts and the additional chill created by your speedy forward movement. The arms and sides are a lightweight merino wool blend to keep you warm but not overheated as you work up a sweat. Your most heated and sweaty zones, under the arms and down the center back, have FlashDry material to wick moisture and dry it out fast. Thumbholes keep the sleeves in place and keep your hands covered as you push your running limits.
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