- Men’s beige 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 A classic fit with a neutral colour. Adopt the laid-back look of the beige linen shirt. Pair it with khaki, cognac or white.