Explore men's sleepwear collection at Topofstyle, consisting of robes, tracks, pajama sets, shorts, and boxers. U.S. Polo Assn.. was launched in 1890 and, today, the brand sells internationally in countries like India, UK, France, and many others. Overall, U.S. Polo Assn. sells its products in 135 countries internationally. Gray is the standard choice and makes many products beautiful without much effort.