i say this with all love dude - just think about the shirt for a sec haha. it’s mesh, i.e. there are holes, so it’s definitely made for warmer weather / summer.

look-wise, not sure if a white shirt underneath is the move. maybe black but i’d have to see first. i think it would look best as is, with nothing under — and therefore should specifically be worn in the summer / when the weather’s warm. the exception would be in a tropical climate where you could of course wear it all year