GEO 6.0-640W is a woven monofilament filtration geotextile made of 100% high-tenacity polypropylene yarns. GEO 6.0-640W resists ultraviolet and biological deterioration, rotting, naturally encountered basics and acids. Polypropylene is stable within a pH range of 2 to 13. GEO 6.0-640W has a Percent Open Area of 6 % and resists clogging.GEO 6.0-640W meets the following M.A.R.V. values except where noted. Click here for Product Data Sheet.