Malaysia making it mandatory to wear a face mask when using public transportation and in crowded" public area otherwise be jailed or penalty RM1000.
Where we must wear a mask?
In these situation, you should no need to wear mask.
Exercising. Wearing mask may make you hard to breath in/out.
Driving. Wearing mask while driving also make you hard to focus
Infant/Kids below 2 years old.
For people having difficult breathing or health condition.