Our 15ft patio double-side umbrella provides an ample shade to keep you cool and protect from hot sun. This umbrella made of thick steel pole and quality polyester, which is antirust and waterproof that great for outdoor use. It is worth mention that this patio double-sided umbrella comes with a rugged base, which weights can up to 220 lbs when filled with sand. Even better, this solar double-sided umbrella comes with 36 built-in Led lights and premium solar panels, which allows you to enjoy outdoor leisure day and night. The extra large double-sided design also matches your desk and chair and provides more shade area. The umbrella cloth has a rope that holds the umbrella cloth well when not in use. The wind vent allows cool air to flow through for stability.