This Canvas Makiwara bag is the ideal punching and kicking target used in karate, muay thai, and mixed martial arts training. It is made of a very heavy weighted and durable canvas with a reinforced stitching and brass grommets. Zippered sections allow you to fill the bag with sand. Filler/Sand is not included with bag. A traditional way of practicing your striking techniques and fine tuning your ninja warrior skills with this true to life canvas bag while strengthening your physical tools; Hands, knuckles, and feet.