What time to wear flag zentai?

The patterns of zentai are various, and mainly divided into: original(unicolor), mermaid, flag, camo and super hero. different patterns for different occassions, and what the flag zentai for?
When it needed to be identified and when it needed a flag, then a flag zentai is needed. and the most frequently apperaed place is usually the nathional sports events.
The sports fans choose to wear the flag zentai suit that they supporting, usually their own country flag, unless someone really love another ountry except his/her own. the flag zentai is a way to show their passion to the country, so it always feels pround when they are in their own country flag zentai.
Also the flag zentai is made of the lycra fabrics that allows wearers to do things normally. so you could wear flag zentai at anytime you want, there is no such a special time.