3M 8511 Disposable Respirator N95 Cup Face Mask, Non Woven Fabric, Exhalation Valve, Metal Nose Clip and Elastic Headband Particulate, Anti Air Pollution Respirator With Filter (Pack of 2)

Very good, covers all side well. Only downside is the elastic bands.

If worn properly, the isolation of nose and mouth is so good that the covered skin starts sweating. Not a super comfortable mask but I think it's a tradeoff for protection offered. I cannot wear it for more than 2 hours without getting a headache. The valve helps a bit but it's efficiency reduces with multiple uses and one has to exhale harder to let air out of it.** EDIT **I agree with some other reviews here that these do NOT come in original 3M packaging and are crumbled. 3M sells them in packs of 20, 50,100 I guess and they are being sold on loose here. Being crumbled isn't a problem but the fact that these have been taken out of their original packaging casts a doubt on their sterility -Who knows how they were handled. Unless one is willing to shell out thousands of rupees to buy these in bulk, one cannot expect original packaging.

Fake product.Recived without box (3M considers it as fake if sold without box)Valve poor quality. Mask very tight and quality of material very low.Clearly it is a fake product, I'm returning it.

Though the seal and protection they provide is very good...the mask is extremely tight to the point that it leaves marks on your face. Not wearable for any longer than 5 minutes in a stretch. the straps too are non adjustable and very small. Could have been a much better choice if the straps were adjustable

Good product. Good delvery

I was quite surprised when I received the mask and it was dirty, as it shows in the picture. They need to take more care in the packaging, it cannot be delivered as that :(

worst

This mask provide you perfect user seal. The only problem you may face is head loops are not adjustable and feels very tight and uncomfortable. You can't wear it for a longer duration. But still if you want perfect user seal and good quality then you can think about it.