It can prevent land soil from water and rain erosion before grass covering grows. 
After sowing seeds, the gauze pad can protect the seed from being dispersed by the wind and the rain, so seeds can be on slope equally
when the slope angle is 45, its retaining rate is up to 98%, even when the slope angle is 60, its retaining rate can still up to 85%
It can reduce cost of construction by a width margin, cost is only 1 / 7 concrete,1 / 8 stone
It adopt macromolecule material and anti - UV rays stability, its chemical character is very stable, no pollution to environment