Can you trust the quality of masks being sold on roadside? | Master Stroke

You must have seen the weekly markets that are setup in villages and some urban centres in a city. These markets have various types of cheap products. Now, face masks and sanitisers are also being sold in these markets. Due to an ongoing pandemic of Coronavirus (Covid-19), many buy these masks and sanitisers from these markets as it is available cheap. But, are these face mask and sanitisers effective? Can they actually protect you from the virus?