GREENSCAPES GS-300 Drainage Composite consists of a polypropylene drainage core of fused, entangled filaments and a non-woven polypropylene filter fabric bonded to the top side. The entangled filaments are molded into a square waffle pattern that maintains this flexible design. GS-300 is installed with the filter fabric side up to accept the placement of growing media. The material content of the product includes 40% post-industrial recycled polymer by weight.