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Geofabric

Geofabric 

Dewitt Black 4-Foot by 100-Foot 3oz Weed Barrier Pro Landscape Fabric PBK4100 

Available for about $47 for 4'x100' from

http://www.amazon.com/Dewitt-100-Foot-Barrier-Landscape-PBK4100/dp/B0016AJC2U  

 

Brochure:  http://www.dewittcompany.com/pdfs/06_landscape_fabric.pdf