Iron Heart was originally made for bikers, and even today that focus guides design and construction of the clothing. Confident that the clothes appeal to a variety of owners, Haraki-san conceives of them to be worn by riders and for their preferences. Iron Heart garments are primarily made from heavyweight fabrics, designed to be durable, and to some extent protective for motor bikers. Iron Heart clothing is classic in materials and styling, using mostly flannels, denim, and chambrays for shirts and basing jackets on time-tested military or riding favorites. By Iron Heart's own admission, "over-engineered is our starting point" and a philosophy that strongly resonates with us.