When sourcing shade net rolls, the most critical factor is the Shade Rate (Percentage), which typically ranges from 30% to 95% depending on the crop or application. You must also verify the GSM (Grams per Square Meter), as a higher weight usually indicates better durability and wind resistance. Ensure the material is 100% Virgin High-Density Polyethylene (HDPE), as recycled materials degrade significantly faster under UV exposure. Additionally, check for UV Stabilizer additives (usually 3-5%) to ensure a service life of at least 3 to 5 years in high-radiation environments.