Air travel has no shortage of official instructions, but some of its thorniest rules are nowhere to be found on the safety card. Lufthansa is now giving those unwritten codes a dress code of their own, where familiar debates over armrests, reclining seats, boarding etiquette and post-landing applause have been turned into a limited-edition fashion collection. Created with advertising agency Serviceplan, Lufthansa’s Travel Etiquette Collection spans seven hoodies, T-shirts, caps and accessories