2 flat, buttoned-down chest pockets with pen division Vertical cotton mesh back ventilation Underarm cotton mesh ventilation 155gsm cotton drill Back double mesh, vertical vents and underarm vents with natural cotton mesh. Reinforced, top-stitched seams All natural cotton fibre assists in the control of static electricity Suitable for work wear and industrial wear environments Bisley Workwear BS1895 Short Sleeve Shirt - Open Front - Cotton - Light Weight - Orange/Navy - S