Under Armour Armourvent. Lightweight, casual fit functional shorts with arm Ourventtm technology for outstanding breathability and HeatGear technology for a cool and dry feel, during sporting performance and on warm days, featuring an elasticated, adjustable logo waistband, 2 side pockets and strategically placed mesh inserts for optimum ventilation; Short side slits on the leg ends, logo details and design elements in contrasting colour; Side Length (with strap) approximately 56 cm/Size M; Material: 100% Polyester.