Artsadd Custom Yellow And Lime Green Spiral Fractal Foldable Sun Rain Travel Umbrella Made from 100% polyester pongee waterproof fabric. Using heat sublimation technique to prevent discoloring, long-lasting effects. 8 ribs made from strong fiber for extra support. Each rib sized in 21.7 inch and consists of 3- section aluminium for flexibility and strength. artistkittybitty