This polypropylene fabric weed block has been the choice of professionals for over three decades!  It is an engineered geotextile and it features a marker line every 12″ and a very high UV rating providing many years of worry-free use.

Sold by the roll. It is available in sizes:

6×300

4×300

4×100

4×50

4×25

3×300

3×100

3×50

3×25