T-Shirt Intensity is an extra-lightweight running top with a tailored fit for training or competitions. The fabric's properties provide optimum ventilation and wicking so that the T-shirt feels dry while you are exercising. Flat, ergonomic elasticated seams to prevent chafing. Mesh panels under the sleeves provide increased ventilation where you need it most. Extra ventilation in the form of laser-cut holes at the top of the back section allow fresh air in and hot, humid air out.