What do you wear for acupuncture?

I've never been before but have an appointment in a couple days. Problem is it's cold and rainy here so I can't wear shorts or a skirt which would be my go to for something like this (too cold for tights as well). For a top I'm thinking a tank top with a big jumper over it so I can just take the jumper off, no big deal. I'm stuck for trousers though because I only wear skinny jeans this time of year and all my looser trousers are too cold or short or scruffy joggers.

What do you wear? I don't mind stripping off or whatever but I don't want to turn up and takeoff my clothes with the acupuncturist like "wtf why you stripping" haha

I overthink things, help and thanks.