★Why need a filter★ Active carbon filters, separation of 99% of the dust, chemicals, particulates, gas, pollen, smoke and fumes. The dustproof filter can be used for anti-dust, anti-vehicle exhaust, anti-pollen allergy, anti PM2.5 and haze day protection. It is suitable for cycling, running, biking, hiking, skiing,woodworking and other outdoor activitie. Five Layers of Filter Protection The first layer blocks larger particles;The second layers can filter 0.3 micron PM2.5 particles. The third layer is activated carbon filter layer, adsorption of harmful chemicals;The fourth layers can filter 0.03 micron PM2.5 particles.The fifth layer is the inner layer of non-woven fabric, comfortable and breathable, resistant to dirt, so that wearing more sanitary. Warm Note: 1.When film or sticky sediment stains emerge, please replace the filter. 2.Filter insert can not be cleaned and should be replaced everyday for getting best protection. 3.The fabric on the surface may appear wrinkled during the manufacturing process, but it does not affect the normal use of the product. ★The grain of the filter surface may be attrited during the manufacturing process, but it does not affect actual use★
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