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      Product Specifications


      95% Polyester/5% Elastane

      Item #


      Style #


      US sales only.

      Item is returnable, but does not qualify for free returns.

      Under Armour ColdGear Reactor Run 1/2 Zip Men's

      A formulated and focused running top, the Under Armour ColdGear Reactor Run 1/2 Zip features well-crafted technology for avid runners tackling colder weather. The ColdGear® Reactor technology offers Smart Insulation that provides adaptive, balanced warmth during any level of activity. This lightweight, fitted style is made from 4-way stretch fabric for ultimate freedom of movement. This cold weather top is perfect to wear on its on or as a layering piece for extra warmth.

      • Reflective UA logo at left sleeve and at back yoke.
      • Features 360° Reflectivity for enhanced visibility.
      • ColdGear® Reactor helps regulate warmth to keep the body temperature balanced.
      • Fitted style helps provide an athletic look and feel.
      • Specialized panels at high-heat zones offer enhanced comfort.
      • Features free-cut material at the wrist with built-in thumb holes for added coverage.


      Small: 35-37" chest
      Medium: 38-40" chest
      Large: 41-43" chest
      Extra Large: 44-46" chest
      2XL: 47-49" chest

      *Measurements refer to body size, not garment size.