[Function Analysis of Second-hand Vintage Umbrellas] Based on the use of SSV-Polyester Fiber umbrella cloth and LRC coating, Chanel increased the density of the umbrella cloth and upgraded the umbrella frame material for better sun protection and use experience. It effectively blocks 99% of the direct sunlight on the umbrella surface. The ultraviolet rays on the umbrella cloth, combined with the high water pressure and dense weaving, will repeatedly consume the remaining 1 ultraviolet ray in the gaps of the umbrella cloth to finally achieve the sun protection effect and rainproof effect, not to mention umbrellas, parasols, sun umbrellas, and umbrellas.