TenCate NCDOT 4 OZ 140N 12.5X360 Mirafi® 140N 12.5' x 360' Non-Woven Geotextile - Mirafi® N-Series nonwoven polypropylene geotextiles are used in a wide variety of applications including soil separation and drainage applications. Lightweight nonwovens are predominantly used for subsurface drainage applications along highways, within embankments, under airfields, and athletic fields. For these drainage structures to be effective, they must have a properly designed protective filter.