Prefabricated high-performance hydraulic and mechanical properties consist of a box-shaped outer cage covered with geotextile separator and core draining "pebbles" Styrofoam is not recycled fibers, insoluble and chemically inert to water.

Prefabricated high-performance hydraulic and mechanical properties consist of a box-shaped outer cage covered with geotextile separator and core draining "pebbles" Styrofoam is not recycled fibers, insoluble and chemically inert to water.