Popping open a large umbrella helps prevent overheating and sunburn, but it doesn't quite have the same area of coverage compared to a pop-up canopy tent ... above about 10 x 10 have enough ...

Features :Value King Slant Leg sets up in minutes with no tools required ... Frame and Cover: Slant Leg design provides extra stability. 10-foot by 10-foot footprint and 8-foot by 8-foot cover.