- Men’s army green shirt - Monaco collar, long buttoned sleeves - SLIM fit, pure French linen fabric - Buttons to fasten, IKKS button on left cuff - IKKS #actforbetter: fabric contains pure Masters of Linen® and European Flax® certified flax Army green is the new khaki this season. Make your outfit look great in summer with a plain pure linen shirt, to satisfy all you want in terms of fashion.