Under Armour Knockout Tank Top Size & Fit True to size - order your usual size Loose fitting - designed for comfort Model is 5'10" and is wearing a size S Details End Use: Training Knockout Tank Top by Under Armour Black Sweat it out in style with the Knockout tank top. Crafted from sweat-wicking fabric, you're kept cool, dry and comfortable from start to finish, while wide armholes and a breezy fit allow air to flow when it counts. Quick drying fabric keeps you cool and comfortable The front hem hits your hips for a natural feel The back hem is stepped for extra coverage A racerback and wide armholes let you move freely and fully Cut-out detailing aid cooling and give a bold finish too UA graphics and logos give a timeless touch Material