Folding Umbrella Material: Polyester, fiberglass ribs, fabric. >Net Weight: 0.42kg. Size: Folding size: 12.6 inch, Expansion size: 46 inch. Function: Its unique inverted design allows the wet canopy to fold inside, with no splashes or drips, keeping you and the floor dry. The umbrella features 8 reinforced fiberglass ribs and a sturdy all metal shaft and frame. Design: With a simple button push, our sun umbrella uv protection springs open or close in seconds.