The 15ft patio double-sided umbrella provides ample shade to keep you cool and protected from the hot sun. Made of thick steel pole and quality polyester, it is rust-resistant and waterproof, perfect for outdoor use. The umbrella includes a rugged base capable of holding up to 220 lbs when filled with sand. This solar double-sided umbrella comes with 36 built-in LED lights and premium solar panels, allowing you to enjoy outdoor leisure day and night. The extra-large double-sided design matches your desk and chair while providing more shade area. The umbrella cloth includes a rope for securing when not in use, and the wind vent allows cool air to flow through for stability. The umbrella features a thick steel pole with powder coating for rust resistance, and 12 steel ribs for extra support. It is easily opened and closed with a crank handle, and the security bolt fixed canopy ensures stability. Additionally, the canopy is secured with a rope for easy storage after closing.