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Bring the heat in the Under Armour Heatgear Flyweight Singlet. Full mesh back construction offers excellent breathability, and lightweight moisture-transfer fabric works to keep you dry and comfortable. Sleeveless construction is great for running on hot days.


  • Blue (457)
  • Orange (808)


  • Mesh panel down the center of back for enhanced breathability
  • Soft moisture-wicking fabric to keep you dry and comfortable
  • Sleeveless construction for hot weather running
  • Crew neckline for an athletic fit


  • Main Body (100% Polyester), a soft moisture-transfer fabric designed to keep you dry and comfortable

Apparel Performance Characteristics

Apparel Fit: What's this?

  • Compression
  • Fitted
  • Semi-Fitted
  • Relaxed

Temperature Range °F: What's this?

  • Cold
    • Below 30
  • Moderate
    • 30-45
    • 40-55
    • 50-65
  • Hot
    • above 65

Fabric Thickness: What's this?

  • Thin
  • Medium
  • Thick

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