Comfortable t-shirt – This boys fitness t-shirt is made of lightweight material and offers ultimate comfort thanks to its optimised fit. Soft and breathable – With its UA Tech fabric, the comfortable and lightweight running wear is soft and breathable with a natural feel. Loose cut – This lightweight gym t shirt for boys features a loose fit, meaning it offers full freedom of movement and a comfortable feel. Quick-drying – The material of this item of fitness clothing draws sweat away from the body and dries quickly, keeping the wearer cool and dry. Material and fit – Under Armour UA Tech 2. short sleeve t-shirt for boys, breathable sportswear for kids, fit - loose, material - 1% polyester.