Punch bag training is pivotal to many styles of martial arts. Free standing punch bags from Century such as the flagship Original Wavemaster freestanding punch bags have proven to be the defacto standard of punchbags. Watch this video of the BOB Free standing punch bag.
Free standing punch bags workouts are extreemly popular for home and Gym workouts. Watch this demo and get an idea of why they are so popular. Pad-up recommend Wavemaster punch bags from Century.