Using these sandbags is easy. You can do a variety of exercises like lunges, squats, and shoulder presses to work out your upper and lower body. Just fill the filler bags with the desired weight and put them inside the sandbag. When handling the sandbags, make sure to grip the handles firmly to avoid dropping them. As for maintenance, keep the sandbags in a dry place to prevent the nylon from getting damaged. If the sandbags get dirty, you can gently wipe them with a damp cloth. Also, check the filler bags regularly for any signs of wear and tear, and replace them if needed.