KOVAL INC. 10 Foot Green Half Umbrella w/Off the Wall Tilt Patio 5 firm ribs construction, much more sturdy than the 4-rib half canopy UV30+ 180g/sqm polyester umbrella canopy: More effectively for UV blocking More durable and with better water-resistance effect than other 160g/sq polyester canopies Color Fastness up to European Standard Level 4: Better and keep color more firm than European standard level 3 tops current market Keep original color anti-fade for at least half a year longer than those without any anti-fade technology Air vented at the top, cool and can withstand sudden gust Water-resistance canopy for outdoor scenery & breeze enjoyment even when drizzling