Some times w/o, but mostly with a black knee-high. Only because if you take a boot off without socks, good luck getting it back on. WD works, but then the footbed is "slippy"
Yes, they're funky. Fuinky with socks too. When feet "perspire" and you have on wicking socks, where does the moisture go? Yup - capillary action pulls the moisture from wet to dry ... it moves to your liner until the sock and the liner are equally moist, then you have "balance". Pretty much the same with cotton too, except the cotton will saturate more next to your skin. The wicking basically stops when the moisture wicks through the liner and hits the cold plastic shell and condenses. ... it's there, hanging around between you liner bottom and the bootboard. Pull the boot board and it'll be under there too.
If you sit on a dry chair with a damp bathing suit, does the chair get wet? Same with boot liners. Of course, the old vinyl Lange Flo liners never 'sorbed nuthin'. Like a terrarium in there!: Thank god those aren't around anymore.
Can't we find something more pleasant to talk about?