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The Under Armour HeatGear Sonic Comp Sleeveless Shirts are the advancement in Under Armour's performance workout apparel. The HeatGear Sonic features all the same moisture wicking and heat reducing capabilities as the previous design, and is now made with lighter, thinner material which increases mobility and further enhances the sweat eliminating properties. Compression design improves muscle recovery while reducing fatigue to maintain power output and sleeveless for those that want unlimited range of motion.

  • Model Number: 1236226
  • Under Armour Sizing Guidelines:
    Shirt Size / Chest Size
    SR SM / 34" - 36"
    SR MD / 38" - 40"
    SR LG / 42" - 44"
    SR XL / 46" - 48" 
    SR XXL / 50" - 52"


  • Compression Fit
    • Under Armour's signature compression fit and moisture wicking comfort
    New Sonic Design
    • Evolution of performance design
    • Lighter, thinner fabric with improved seam design
  • HeatGear® Construction
    • Moisture transport fabric wicks moisture away from the body
    • Keeps the athlete cool and dry
  • Armour Stretch™ design - 4-way stretch improves mobility and accelerates dry time
  • Smooth flatlock seam knits provide a full range of motion without chafing
  • Anti-odor treated
    • Controls odor by preventing the growth of odor causing microbes
  • Materials: 84% Polyester / 16% Elastane


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