There is high-tech Nano Polymer Compound in the outermost coating layer. Its excellent water-repellency helps you shake most water off and put it back to your purse easily after use. In addition, the layer prevents 95% of the UV. QUALITY CONSTRUCTION : The frame has a black metal shaft and comes with fibreglass ribs meaning the umbrella won\t break in strong winds. It has a generous slip resistant rubberized handle and a wrist strap for easy carrying and control in windy conditions.