British expression question, please...

I recall reading a few times some kind of expression in British literature that I can’t recall exactly, but it always puzzled me. It was something about feet and cotton. Or toes and cotton, I’m not sure.

Anyone know what the exact expression is, and what it means?

Could you please be a bit more vague? (smile)

The only thing that comes to mind is ‘bless his cotton socks’, which can be used sincerely (the speaker is appreciative of something or other that the person referred to has done) or ironically (the speaker can’t stand the person referred to but is using this juvenile-sounding endearment in an ironic and deliberately patronising way). The latter is more common in contemporary English society, but the former is still heard from time to time.

It also implies the neiveness or youth of the person being so blessed.