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sun sail shades

You should learn some terms of sun so that you can choose right sun sail shades according to the area you live. UPF stands for Ultraviolet Protection Factor. A UPF rating number can be associated to a certain protection category depending on how much UVR it blocks out. UPF Ratings gives us an indication of how effectively a fabric is blocking out the solar ultraviolet radiation. UPF ratings of 15 to 50 means it more effective in blocking UVR and can better protect the wearer of the fabric/garment. The composition of the yarns whether it is made of cotton, polyester, etc can greatly contribute to a UPF rating.