Hair products sold in U.S. department stores—in particular, styling and mousse products, and hair conditioners—continue to see retail sales success, according to a new report from The NPD Group, a Port Washington, NY-based research firm. “The growth in styling and mousse products, as well as conditioners, is the latest evolution in what appears to be a growing trend in haircare products sold in the department store channel,” said Karen Grant, vice president and global industry analyst,...