I want to ask about Medical Isolated Mask price

What is the best mask type to be used ?
The best medical mask to save you from getting corona virus infections is N95 MASK
How N95 mask protect you ?
This type of mask prevent more than 95 % of microbes from getting in, so it will protect you from different types of microbes including corona virus
? How to Wear the N95 Mask
You should always read and follow the manufacturer's directions when using an N95 mask. It must cover both the nose and mouth to keep you from breathing in mold and dust. If it does not have a snug fit, it will not work properly. Correct fit of the mask requires contact with smooth skin. It will not work properly for people with beards or facial hair. Even one-day beard growth has been shown to let air leak in. Always use both straps on the mask to hold it in place to keep air from leaking around it
? How to Make Sure the Mask Fits
Do a user seal check, including both positive and negative pressure checks, to verify that you have correctly put on the mask and adjusted it to fit properly

What is the price of N95 mask ?
The price of this mask is between 15-20 USD