The material itself possesses excellent moisture resistance: Mainstream eco-friendly woven bags are typically manufactured from polypropylene (PP) or polyethylene (PE). These materials exhibit natural hydrophobic properties, effectively blocking the intrusion of external moisture and thereby minimizing the risk of grain spoilage due to dampness.

It can be laminated with an inner liner or a PE film to enhance moisture resistance：Balancing Breathability and Moisture Resistance: Certain woven bags maintain a degree of moisture resistance while retaining moderate breathability; this helps regulate the internal microenvironment of the bag, thereby preventing mold growth caused by moisture accumulation.

Some woven bags feature a composite layer—consisting of PE film, BOPP film, or a moisture-proof inner liner—applied over the woven base fabric. This significantly enhances their sealing and moisture-proof properties, making them suitable for grain storage in long-term or high-humidity environments.

Durability Assurance: Intact Moisture-Proof Structure—High strength and tear-resistant properties ensure that the woven bags remain resistant to damage during handling and stacking, thereby maintaining the continuity and effectiveness of the moisture-proof layer.