About this item 7.5′ diameter portable shade for 1-2 workers 300 denier polyester umbrella top is NFPA 701 and CPAI-84 compliant for flame resistance Fabric blocks out 98% of harmful UV rays Wind vents on top increase stability and maximize airflow Tilt mechanism offers directional shading and 3-Position push-button locking height (87.5″ max height)