Phasechange materials absorb excess heat during exertion

The Under Armour Whisperlight Tie Back Short Sleeve Womens Training Top has Whisperlight fabric which gives greater stretch & recovery, an ultra-soft feel & a more breathable performance.
Features:

• Loose: Fuller cut for complete comfort
• Whisperlight fabric gives greater stretch & recovery, ultra-soft feel & more breathable performance
• Material wicks sweat & dries really fast
• Double key-hole open back design with dropped hem for enhanced back coverage
• Wide, boat-neck collar for a more feminine silhouette
• 100% Polyester

Quickdrying technology accelerates moisture evaporation by 40%