UA Siro has a unique construction that's super-light, dries incredibly fast & won’t cling to you. Anti-odor technology prevents the growth of odor-causing microbes. Generous ½ zip front with stand collar for easy l...

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UA Siro has a unique construction that's super-light, dries incredibly fast & won’t cling to you. Anti-odor technology prevents the growth of odor-causing microbes. Generous ½ zip front with stand collar for easy layering.

  • UA Siro has a unique construction that's super-light, dries incredibly fast & won’t cling to you
  • Generous ½ zip front with stand collar for easy layering
  • Under Armour’s mission is to make all athletes better through passion, design and the relentless pursuit of innovation
  • Where we started? It all started with an idea to build a superior T-shirt
  • The technology behind Under Armour's diverse product assortment for men, women and youth is complex, but the program for reaping the benefits is simple: wear HeatGear when it's hot, ColdGear when it's cold, and AllSeasonGear between the extremes.

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