The KEYSI Fighting Method (KFM) is a renowned self-defense system that has gained international recognition for its effectiveness and practicality. Developed by Master Keysi Beistegui, a Spanish martial arts expert with over 40 years of experience, KFM focuses on providing individuals with the skills and confidence to protect themselves in real-world situations. The KFM Urban X Program, specifically designed for urban environments, is a comprehensive training system that includes the YELLOW Portable training tool. This paper aims to provide an in-depth analysis of the KFM Urban X Program and the YELLOW Portable training system.