Face coverings (or fabric masks), are not regulated, and we do not have enough evidence at the moment to say whether these provide the wearer with protection; although it is likely that they do provide some. They are likely, however, to help to protect others by preventing the spread of droplets that could carry the virus if you have it.
Surgical masks provide some protection to the wearer, though as will all masks/ face coverings, the level of protection reduces the longer the mask is worn for.
If face coverings and masks are not used correctly, they will not provide protection. This is why it is very important to follow the World Health Organization (WHO) guidelines for putting on, wearing and removing masks.