Specifications: Available from us are self inflatable flood sandbags made from enviroment friendly material suitable for flood blocking, lowland protection, as well suitable for these areas with little sand and rock resources. When using these bags, simply immersing these bags into water, then these bags will become inflated and full, weighing about 15 kilos each, thus becoming a "sand bag" full of with "sand". Afer use, these bags can be easily returning to normal state simply by putting them in the sun to remove water or adding some special powder. You can burn them if you no longer need them, thus without enviroment pulluted. By disused bags. More information can be provided upon request.