UPF 50+ Ultraviolet Protection -- Crafted with 190T polyester, the beach umbrella is PU coated for excellent UV protection. Lower the sensible temperature under the large shelter by 10 F for comfort and coolness. Sturdy Frame & Stable Construction -- An eight-bone outdoor umbrella is much tougher with plastic and fiberglass material combined. Strong to withstand sudden winds and durable to resist bending. Air vents on the top function for high efficient ventilation and heat dissipation. Patented Sandbag for Heavy Duty -- Double stabilization design! Easy to fix the pole with anchor and 44 pounds of sands filled in the sand bag.