... side is weav geocloth 2,Clay liner have good tightnes,water prood 3,good flexbility 1.Specifications1,one side is geotextile ... side is weav geocloth 2,good tightnes,water prood 3,good flexbility 4,long water proof capacity2.composition:GCL (Geosynthetic Clay Liners ... it won't be aging.High expansion rate,high water absorbing capacity,low specific water conductivity.High filter rate,it can self-repair ...