Mask Breath Respiration Valve PM2.5 Haze Protective Masks Dust Protection Cotton Winter Warm Masks

Features:?
1. Use of environmentally friendly fabrics, PM2.5 air particulate matter box bacteria filter.?
2. Rotating adjustment buckle, adjustable ear rope, suitable for most people.?
3. Plug-in filter, multi-layer structure, PM2.5 air particulate matter filtering effect is good.?
4. Breathing valve design, expiratory mask can make hot and humid gas quickly discharged.?
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Specifications:?
Material: Cotton inside;?
Color: Black, gray, dark blue;?
Weight: 30g;?
Size: 25.5cm x 11cm;?
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Package included:?
1x?PM2.5 breathing valve mask(The shape of the filter valve is random (round or square), which does not affect the actual effect)