Reinforced Metal Backing: a rigid metal core prevents sagging and maintains shape under heavy rain, snow, or strong winds; Tested for extreme temperatures, it 't warp or crack over time Activated Carbon Layer: the built in carbon filter blocks pollen, dust, and airborne particles while neutralizing odors, which can keep your attic cleaner and reducing musty smells without restricting ventilation Long Mesh Roll: at . 19.7' L x 9.8" W, this vent filter easily covers most vents; Its flexible design allows custom trimming for a precise fit, ensuring maximum attic airflow while keeping and debris out UV and Water for : UV anti material resists sun damage, while the waterproof design prevents mold and deterioration; Performs reliably for years, even in harsh climates Easy Roll Out Installation: simply unroll, cut to size, and secure with included nails; No special tools needed; The design makes DIY installation a quick, one person job, Weight: 1.1904962148 Pounds, Manufacturer: Gishbjka