What's in the sandbags used to fight floods

What is contained in the sandbag for flood control is gravel material. Flood control sandbags commonly known as: fire sandbags, waterproof sandbags, fire special sandbags, flood sandbags, flood control sandbags. Flood control sandbags are generally divided into two kinds, one is the ordinary flood control sandbags, the other is the water-absorbing expansion of flood control sandbags.

There are four general specifications of flood control sandbags, which are 40×50, 30×80, 25×70 and 40×60. Flood control sandbags can be collected and reused after being used and fully dried (if the bag stays intact and has no holes, it can be reused). Emergency sandbags are just like normal cloth bags, lightweight and good handling can be folded and stored; cross-over laying, just like the use of traditional sandbags, but easier to use than sandbags, handling and collection.