Do you often chat happily with your friends outside? The weather outside sometimes prevents you from doing it. This umbrella made of thick steel pole and quality polyester, which is antirust and waterproof that great for outdoor use. The 15ft patio double-side umbrella provides an ample shade to keep you cool and protect from hot sun. The extra large double-sided design also matches your desk and chair and provides more shade area. You can easily use the crank to turn it on or off which is not only laborsaving but also safe. Vents give you more coolness and safety because it allows airflow and reduce wind pressure. Assembly is easy and can be done without the aid of tools.