Explore our shirts collection from the best brands in the market, i.e., Levi's, Gap, Lacoste, Marvel, Diesel, Calvin Klein, and others. U.S. Polo Assn. is an American clothing and fashion apparel brand that manufactures t-shirts, shirts, dresses, beachwear, handbags, and much more for women, kids, and men. Blue makes us feel confident and secure.