GEO 7.0-180NW is a nonwoven needlepunched geotextile made of 100% polypropylene staple filaments. GEO 7.0-180NW resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13. GEO 7.0-180NW meets the following M.A.R.V. values except where noted. Click here for Product Data Sheet.