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What material is used to fill punching bags? - Quora

I have filled my punching bag with sand (half of the whole bag) but it has become very heavy and tough. What alternate material can I use instead? - Quora

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How do you best fill a punch bag? The way how we doing it!

How do you best fill a punch bag? The way how we doing it!

What's the best way to approach the punching bag in the gym? How should I start working out with it? - Quora

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What Is The Best Filling For A Punch Bag? - Quora