Essential winter clothing?

Never bothered myself, but a batch arrived in my old office and there was a lot of swearing and ripped velotoez from those that bought them
I thought despite the obvious waterproof effects, they were more of an aero gainz thing.
Not really commute practical

I have velotoze MTB, they didn't ripped yet but I'll only use them if it's biblical, a bit of a faff to get in.
Would use for long rides in the rain, but for less than an hour commutes it's not worth the effort.