Under Armour flattened out the fibers and added some science to give the Under Armour Iso-Chill Run Singlet for Men game-changing fabric that quickly pulls heat away from the skin. You stay calm, cool, and crushing at max capacity. Iso-Chill fabric disperses body heat to feel cool to the touch. A mesh back panel supercharges breathability. 4-way-stretch fabrication lets this Under Armour tank top flex to move with you. Odor-fighting enhancements keep it fresher between washes, and reflective details improve low-light visibility. 90% polyester/10% elastane. Machine wash. Imported.Manufacturer style #: 1361927. 90% polyester/10% elastane Iso-Chill fabric Mesh back panel 4-way-stretch fabrication Fast-drying Moisture-wicking Odor-fighting Reflective details