
The use of stones instead of sand was excellent. They have a slightly different pouch shape (rocks) but fit well and complain when placed in sandbags. I bought the stone from my local warehouse and filled them in until they were filled while still being flat enough to close them. You have to close them carefully, the zippers work fine but you have to pinch in front of the zipper path and gently pull the zipper forward for them to work. Keep the front zippers tight to ensure they close smoothly. Once you've done this, you'll complete them at a steady pace. If you buy four 40 pound sacks of these bricks, they will all be filled and you will have a handful of bricks remaining. This is a great product and the stitching will last a long time with proper use.

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