VEVOR Non Woven Geotextile Fabric Under Gravel, 4x100FT 8OZ Driveway Fabric Landscape Fabric, Heavy Duty Weed Barrier Fabric, Ground Cover Weed Control Fabric, French Drains Drainage Fabric, Black

This is giving the weight as amount of material to expect per square metre/yard. It's basically a measure of effectiveness. A heavier material may filter better, or slow down liquid flow. You'd have to look up and compare performance per particulars. The item appears to be groundcloth over the drainage around the base of a foundation,in which case it would prevent perforated pipe from being clogged by sand and silt.

8oz is per square yard (3ft X 3ft) And 226.8g is per square meter. Same values, just different units (oz vs grams; yard vs meter)

Fine for me but it’s plastic so it’s not organic

I'm not sure I only use it I put it under pallets to for my nursery plants that are in pots I don't have it where it would be in direct contact with other plants but I would say it's not organic it's plastic

I use this fabric to cover pathways around my raised beds. It’s withstood direct sunlight and prevents muddy paths. I use mulch around my plants so I can’t answer your question directly but it is a good product.