Yoga clothing comes in two main styles:
The first has a granola sprinkled, semi-bedraggled aesthetic—usually involving some sort of head scarf, and often accompanied by the smell of soup.
The second is a no-nonsense look, for business stretching. The kind of outfit that Captain Jean-Luc Picard would sleep in.
Was Star Trek: The Next Generation an influence for the founder of Lululemon, Chip Wilson? We can’t know for sure, but come on, it’s obvious.
Here’s a cartoon from Wired Magazine, June 2020: