Double Punched Non-Woven Geotextile Drainage Filter Fabric 4 oz- Commercial Grade – 150 Year Fabric – Made in USA (10 sizes) Our purpose built non-woven geotextile filter fabric is made of 100% polypropylene, making it strong yet soft and flexible. It has been needle punched twice which allows water to go through while preventing soils and other material from passing, extending your drainage systems life and performance. It is also great for many other applications including farming/gardening, landscaping drainage, road stabilization and retaining walls.