Same Superior Quality for a New Generation of Athlete. The new Yuushi™ Youth Jiu Jitsu Gi by Hayabusa® has been precisely engineered to meet the needs of young boys and girls (and their parents) as they hone their grappling skills. Featuring high-quality, 100% pure cotton and triple-reinforced stitching, the Yuushi™ Youth Jiu Jitsu Gi delivers a level of quality that is second to none.