Under Armour Heatgear Charged Cotton Undeniable T-Shirt - Women'sThe Under Armour HG Charged Cotton Undeniable T-Shirt features a unique fabric blend which provides a super-soft and athletic feel for superior comfort and performance. The signature moisture transport system wicks sweat away to keep your skin cool and dry. Fitted. HeatGearŪ is best for weather between 75 and 100 degrees. 55% cotton/34% polyester/11% rayon. Imported.