All you need to do is add water.The StormBag weighs less than 1 lb and rapidly expands to ~30 lbs in just three to five minutes. StormBags eliminate the need to stockpile sand and bags, as well as the heavy equipment and personnel required to fill and deploy traditional sandbags. Expands in freshwater only.
When the Stormbag is dry, it measures 14" wide and 24" long.
Once it is hydrated, it measures approximately 22" long and 13" wide.