It can be hard to shop for adults. I received a GREAT adult Christmas present last year: fuzzy pants. You might already have pants, but do you have fuzzy lined pants?
As far as I know, Eddie Bauer is the best brand for this. https://www.eddiebauer.com/s/men-s-lined-pants?keyword=Men%27s%20LIned%20Pants will get you started. They have lined pants for men and women.
This makes a good Christmas present because, for many people, it’s cold at Christmas time. These pants are a game changer for being happy in cold weather.
Something to be aware of is that these pants are not good for hot weather. If you have a long hot season where you live, then these pants can go into storage for a bit.