American clothing retailers including Gap, J.Crew, Abercrombie & Fitch, and a slew of department stores are suffering. Mall traffic is down. Shoppers are spending less on clothes and looking for discounts when they do. Amazon and fast fashion are stealing their customers. But there’s another factor hitting these businesses, according to a comprehensive research note by Deutsche Bank. Athletic clothing is taking a bite out of regular clothing’s sales. Read more at Quartz.