Optional summer sun umbrella tips 5. Select brand umbrella custom, beware of fake and every one common umbrella UV umbrella. 6, can initially determine the UV protection properties based on the fabric canopy. In general, the poor cotton, silk, nylon, rayon and other UV resistance, and Polyester better. Usually used umbrella containing polyester fabric colored satin, McBride and so on. In addition, UV resistance with satin fabric best, followed in order by twill, plain weave, the darker the better. Optional summer sun umbrella tips 8. umbrella in the wet case, since the optical conductivity of water supply role of advertising umbrellas, UV transmittance increases, the protective effect is reduced. Thus, wet umbrella not for UV protection. Thermometer can measure umbrellas SPF if they want quality testing umbrella UV sun umbrella Dongguan supply, there is a simple method: a few different materials on the outside distraction umbrella sun umbrella, umbrella inside and outside each put on a the same type of thermometer, 10 minutes after exposure were observed inside and outside the umbrella of the difference of the thermometer, if the thermometer inside and outside the large disparity, indicating the umbrella of insulation, anti-ultraviolet function well, otherwise poor quality. Advertising sun umbrella Supply, sun umbrellas, outdoor Ltd. provided by FREEMAN FREEMAN Outdoor Dongguan. Dongguan FREEMAN outdoor Ltd. (dg-fm.com) strong, credible, in Dongguan, Guangdong travel, outdoor supplies industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead FREEMAN outdoors and you hand into the brilliant, for a better future!