Ryant12
I think I'm derping. If it means none of the three equipped, shouldn't it say "AND" then?
ie. "You are unemcumbered while you have no Gloves, mainhand, and offhand equipped". This wording makes waaaay more sense to me.
"or" is the grammatically correct word here. "no x or y" means you do not have "x or y" - having either an x or a y means you don't meet the condition of "no x or y".
Conversely, if you have x but not y, then you do not have "x and y", so a "no x and y" condition would be met despite having one of the two (because you don't have both).
"And" would mean it's only referring to all of them, which is incorrect because the "no" mean's it's talking about what you can't have - you can't have any of them ("or"), rather than can't have all of them ("and").
See this for some more details: https://english.stackexchange.com/questions/159166/why-do-we-use-or-instead-of-and-when-we-mean-both-things