The High-Density Dustproof Polyester Insect Screen is a 20 mesh, approx. 80 g/m² PET screen mesh designed for better filtration and comfortable airflow. Each opening adds two fine filaments, giving dustproof performance close to 40 mesh while keeping ventilation similar to standard 20 mesh. The water-repellent surface makes dust less likely to stick and allows easy cleaning with plain water. Multi-filament construction with heat setting ensures stable dimensions, no stretching and no thermal shrinkage, ideal for high-end window screen systems.