Polyester fiber, waterproof and sunproof, ribs are carbon steel Fully open size is 37.8 inch x 25.6 inch, folding is 10.5 inch x 2 inch Inside is black, outside is blue Manual design Wide Use for sunshade, windproof and rainproof for travel and outdoors Rainproof and Sunshade Manual Umbrella, 8 Ribs 37.8 Inch x 25.6 Inch Blue Windproof Folding Umbrella for Outdoors (blue)