9FT LARGE CANOPY: This premium patio umbrella is equipped with a 180G 100% polyester canopy that's windproof, waterproof and fade-resistant, 97% UV protection, high-quality material can be used for many years. Air vented canopy at the top designed for air flow and prevent from inversion. HEAVY-DUTY UMBRELLA FRAME: The outdoor umbrella comes with 1.49 inches diameter steel pole coated combined with 8 fiberglass ribs to form a spacious top to provide strong stability. Fiberglass ribs are tougher than iron ribs and better able to withstand strong winds. Rust-free powder coated aluminum & iron pole and iron ribs provides superior strength support that resists wind better. VERSATILE PATIO UMBRELLA: 9FT Patio Umbrella is ideal for diverse settings such as markets, gardens, decks, backyards, pools, and patio tables.