Ever made fleece socks, MROO?
I got a pair when we lived in Canada. They were a revelation! They're soft and cozy and not at all tight so you can wear them to bed and be all toasty and not feel constricted at all.
I loved them so much I got a pattern and made them for everyone in the family. They're not hard to do BUT there is a step where you have to sew something you can't see. I did it by feel and only sewed through my finger once. She doesn't seem to do it but I left the seam allowance on the exterior for a smooth interior and zigzagged them down for a finished look. (That's when I sewed through my finger. But only once!

)
Anyway, if you have extra fleece I highly recommend them.