1. flexible to fold during transportation, stretching out

2. filled with stone or concrete during service, forming into structure with powerful lateral confinement and          rigidity.

3. used as cushion coat to strengthen loading capacity of weak ground or slope protection structure 

FUNCTIONS:

1. Fix railway ground.

2.Fix weak ground of roads and increase loading capacicity.

4.used to build the support block struction

5.Act as independent wall, dock and break-water.

6.Treat desert, beach, riverbed and bank.