【Product Name】Disposable Face Mask ?
【Construction 】3 layers, composed of spunbonded non-woven protective layer ,PP melt-blown static cotton and spunbonded non-woven support layer
【Application 】This product is suitable for daily life protection.
【Size 】17.5cm×9.5cm
【Color 】Blue and white
【Package】50pcs/bag
【Validity Period】2 years
https://www.newstarsciences.com/chemical-analysis-filter-paper/disposable-civil-face-mask.html