IKAYAA Adjustable Patio Garden Hanging Umbrella Outdoor Cafe Beach Parasol 6 Steel Rib Wind Vent Crank Cross Base 100% polyester canopy, well sun-shade and durable product Labor saving crank winding system to open and close umbrella easily Push up and down to adjust umbrella height and opening angle with a handle to fix Lift slider to extend your parasol inwards/outwards Leakage-proof wind vent for air flow and prevent falling in windy days