This 10ft square patio offset umbrella is made of durable aluminum and features an innovative double-top canopy design for airflow and stability. The high-quality 250gsm 100% polyester canopy fabric with a PU waterproof coating is UV-resistant, water-repellent, and colorfast, meeting US standard 4 fade resistant. The patented double-pull design and independent hand crank mechanism make it easy to assemble, disassemble, and adjust.