With Paris at 28°C (82°F) during Fashion Week, guests skipped the new autumn coats for sleeveless tops, and coats were scarce at Louis Vuitton's show, Reuters reports. Warmer autumns delay demand for coats, which are typically higher-margin, leaving retailers at risk of excess stock and markdowns and of shoppers waiting for Black Friday. Former Zara executive Pau Almar, now a retail consultant, says the time for selling coats "has shifted later" and retailers will sell more transitional layers. Louis Vuitton's Nicolas Ghesquière said record heatwaves had a "strong influence" on his thin, airy new collection.