In the past few years, we have covered plenty of sandbags for strength training. You are going to need something to fill them with. This Valor Fitness RC-25 Rubber Crumb Filling has you covered. It has 25lb worth of recycled rubber for your bags. These soft rubber crumbs don’t form dust.
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This material spreads through the bag more evenly than sand. They are made from repurposed tires. You can find out more about it here.
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