It is now compulsory to wear a face covering in shops across Scotland.
The Scottish Government said coverings “may provide some level of protection”, but stated that physical distancing, hand hygiene and respiratory hygiene are the “most important and effective things we can all do to prevent the spread of coronavirus”.
The new law came into force on Friday, however those with certain medical conditions or disabilities and children under five are exempt.
They have been mandatory on public transport in Scotland since the 22 June.
The covering does not need to be a medical mask, it can be made of cloth or other textiles as long as it covers the nose and mouth. For example, you could wear a scarf or snood.
A face visor can also be worn as long as the nose and mouth is covered completely.
The change in law comes the day after the First Minister announced Scotland will now move to phase three of the easing out of lockdown.
Police Scotland said it was asking people to take personal responsibility “to do the right thing”.
A spokesperson added: “Remember the purpose of these measures is to aid the collective effort to protect the NHS and save lives by preventing the virus from spreading.
“Our officers will continue to engage with the public, explain the legislation and guidance and encourage compliance.
“We will use enforcement as a last resort only where there is a clear breach of the legislation. We will do so in a fair, reasonable and proportionate manner.”
Here's how to make your own DIY face covering.