New regulations on face coverings for weddings, civil partnerships and workplace canteens from Friday.
Scots should get used to wearing face coverings in public 'for the foreseeable future', Nicola Sturgeon said.
ScotRail said free masks would be available for a 'limited period' as face coverings made mandatory from Monday.
The First Minister said she will consider if the recommendation should be made mandatory.
The charter flight from China carrying PPE touched down at Prestwick Airport on Saturday morning.