Explore the most-loved boxer briefs, thermal underwear sets, undershirts, tank tops, training pants, etc., from leading brands at slashed prices. C9 Champion is a part of Hanesbrands started in 1919. It was initially named Knickerbocker Knitting Co. It is dedicated to sports and casual wear for men and women. Massy Arias, a certified personal trainer, is its brand ambassador. Once you have picked the right style and budget for you, the next step is a selection of fabric. We have a variety of fabric options like Polyester and Cotton.