Optional summer sun umbrella tips 8. umbrella advertising umbrella Dongguan supply in the wet conditions, since the optical conduction of water, UV transmittance increases, the protective effect is reduced. Thus, wet umbrella not for UV protection. Thermometer can measure umbrellas SPF if they want to check the quality of UV umbrella, there is a simple method: a few different materials umbrella distraction on the outside, each umbrella and put a thermometer inside and outside the same type of exposure After 10 minutes, observe the difference of the thermometer inside and outside the umbrella advertising umbrella supply, if the thermometer inside and outside the large disparity, indicating the umbrella of insulation, anti-ultraviolet function well, otherwise poor quality. The secret summer to buy umbrellas umbrellas umbrellas cleaning Thus, it is preferable parasols and umbrellas used separately, specifically dedicated umbrella, attention to maintenance. If the umbrella is dirty, you can wash with water, but not rub, scrub gently with a soft brush only. Parasol custom, sun umbrellas, outdoor Co. FREEMAN FREEMAN provided by the City Outdoor. 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!