Inspired by the designs and names of old military tanks, the Rival Mark-I Series brings a bold, new look and a refined shape to one of the most vital pieces of equipment in your boxing workout - the heavy bag. By altering the proportions of a traditional bag, thus increasing the width to height ratio, we've successfully created a bag that is more balanced and efficient. Manufactured of ultra-resistant, engineered microfibre, this beautiful bag is designed to last for years of optimum performance.