8 ft Beach and Patio Market Style Umbrella is made of durable 180g polyester amd mounted on steel tube rib structure. It provides UPF 50 sun protection and easy folding. Its pole (1.25 inch) diameter is made from steel tubing. The vent allows the wind to escape from the canopy, this keeps the umbrella more stable in windy condition. The durable carry bag has shoulder strap. The underside of the fabric has silver coating with unique additives to provide UV protection of 100+ and makes you feel much cooler with ultimate shade experience .