The Tek3 shirt is a poly/cotton blend that incorporates Nano Fluid Repellency technology to keep wearer dry and comfortable along with a bonus of functionality features. Occupational athletes will appreciate the Tek3 shirt’s stitched-in creases for a classic military look and expect flex underarm mesh vents for increased breathability and range of motion, dual communication wire access openings in side seams to keep wires obscure and chest pockets with dual access utility compartments. 65% Polyester/35% Cotton Stretch Twill Weave | 7.0 – 7.25 oz/sq yd, Machine Washable