Mark-I Heavy Bag 150lb/68kgInspired 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, weve successfully created a bag that is more balanced and efficient. Manufactured of ultra resistant, engineered microfibre, this beautiful bag is