I think Amazon India is more worst than other. It only survives by its advertisements and its offers like Amazon prime. I was ordered an anti-pollution mask on it by cash on delivery. First, it says that it delivered in 2 or 3 days but it takes 4 days.
Second, I ordered OXY-CLEAR ANTI POLLUTION MASK for RS 450, and it takes RS 50 for delivery charges. but the most important is that, if you ordered an item from COD rather than payment by Debit or Credit Card, you wont get the option to review on its website.  Also, the quality of the mask is totally ridiculous, as like that mask is not more than mask selling on the streets of RS 100 Maximum.
The VALVE it contains is not more than a small toy or scrap, and it contains 2 filters that are totally cheap quality because it shows that filter is of 5 layers but actually it contains totally 3 layers. As 2 outer layers, one is left and one is right that is cloth, and one is in between that is not more than black cloth.  The overall quality of that product is got 1 out of 5 stars in my case. I wonder is all review and stars are fake on AmazonIndia.com