- Men's chalk shirt - Monaco collar, long buttoned sleeves - SLIM shape, exclusive IKKS skull and flowers print - Button closure, IKKS button left cuff - IKKS #actforbetter: material containing 100% viscose from forests managed by the Forest Stewardship Council (FSC), an international NGO whose mission is to promote the ecological, social and economic management of forests Vibrate to the new exclusive skull and crossbones print on this men's shirt. It forms black vegetal lines on a chalk-colored background.