In an effort to contain the spread of the coronavirus, Dutch officials made compulsory to wear a mask in shops, museums, hairdressers and in many other places 1 December.
The new law, which applies to everyone aged 13 and over, will be valid for the next three months.
Those who refuse to wear one face a fine of €95.
The country has so far reported more than 523,000 confirmed cases of infections and 9,376 confirmed deaths.