Heavyweight Karate Gi Delivers Superior Strength. Hayabusa has always been focused on delivering the very best performance equipment and apparel possible, and the Champion Karate Gi is no exception. Specifically developed with 100% premium 16oz. cotton canvas, which provides industry-leading tensile strength, this heavyweight, tournament-styled gi is built to last and delivers the distinct sound made when doing crisp techniques. It has also been constructed with a reinforced lapel and high-grade stitching to ensure ultimate strength and durability. Plus, with superior breathability and it's ability to stay fresher longer than other fabrics, this high-performance gi stands apart from the rest. Honoring Tradition. The entire Hayabusa Karate collection is branded with the traditional Japanese word musha, which is composed of the kanji meaning Warrior; Military Person. So, musha implies warrior in the Bushido tradition and flawlessly embodies the spirit of Hayabusa Karate.