【General use】Black face masks, size for adult: 6.9 x 3.7 inch / 17.5 x 9.5 cm. Safe and reliable 3-ply structure, the middle filter layer is polypropylene spunbonded fabric (melt-blown), BFE>95% | 【Disposable masks】Experts advice wearing it for up to 4 hours. Should be Disposed off after use for your safety, and avoid secondary pollution. When the face mask is damaged, deformed, wet, or other abnormal conditions, the mask should be replaced immediately. | 【Professional design】Independently designed packaging box for easy access, please store in a cool and dry place. If you have any questions or product broke, pls contact us through the "ask seller" of the order. | 【Factory direct sale】 Total 50 pcs. Disposable Face Mask with adjustable memory nose clip and comfortable earloops. All face masks are also packed in the same sealed bag to avoid secondary pollution during transportation. | 【Made in China】The sealed round label of the packaging box is made of paper, which may tear during transportation. The masks in the box is still in a sealed bag, indicating that the packaging is brand new, pls don't worry.