Under Armour Womens Tech Twist Half Zip T-Shirt in Halo Gray and White. Conquer your workout in comfort and style with the Under Armour Women's UA Tech™ Twist ½ Zip. This versatile top is made from UA Tech™ fabric, which is ultra-soft, breathable, and wicks away sweat to keep you cool and dry. The relaxed fit moves with you, while the ½ zip closure lets you adjust to your comfort level. Featuring a Dropped back hem for coverage and Reflective branded details for low-light visibility.