Stop wasting time pulling weeds and you'll have more energy to enjoy your garden. WeedBlock landscape fabric not only prevents weeds, it encourages root growth by keeping soil moist and cool. Made of UV-treated polyethylene, this cost-effective weed control fabric features patented Micro funnels that allow the free flow of air, water and nutrients to the soil while blocking sunlight - and weeds. WeedBlock is perfect for your garden and landscape. Also used under sidewalks, patios and decks to stop weeds and prevent settling.