When sourcing shade net rolls, the most critical factor is the Shade Rate (Percentage), which typically ranges from 30% to 95% depending on the application (e.g., 40% for vegetables, 90% for privacy screens). You must also verify the Material Composition, specifically ensuring it is made of 100% Virgin High-Density Polyethylene (HDPE). The inclusion of UV Stabilizers is non-negotiable for outdoor longevity; high-quality nets should withstand 3 to 5 years of intense sunlight without becoming brittle.