Macy's is launching a "modest" fashion line this month geared toward Muslim women that will feature maxi dresses, ankle-length cardigans and hand-dyed hijabs. The retailer is the latest U.S. brand to tap into the growing Islamic clothing market, after Nike last year debuted a hijab designed for female Muslim athletes, American Eagle began selling denim hijabs, and DKNY launched its Ramadan collection of long, flowing dresses.