Woven inlet inserts are made of woven fabric materials that allow stormwater to pass through while capturing sediment, debris, and other pollutants. The fabric is typically made of polypropylene or polyester, and is designed to withstand heavy rainfall and other harsh weather conditions.

Nonwoven inlet inserts are made of nonwoven fabric materials that are similar to woven inserts, but are typically made of a thicker material that is more effective at capturing sediment and other pollutants. Nonwoven inserts are typically made of polypropylene or other synthetic materials, and are designed to be highly durable and resistant to tearing and other damage.

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