Just some food for thought:
The Illusion that Sleeves of Many Garments supposedly create is a Glammer, correct? If so, then it would feel identical to if you were wearing whatever clothing you transformed your clothes into, including the correct temperature, texture, and weight wearing that outfit would produce, because it is a glammer.Glammer wrote:A glamer spell changes a subject's sensory qualities, making it look, feel, taste, smell, or sound like something else, or even seem to disappear.Therefor, could it be possible that wearing cold-weather gear via sleeves you would gain the bonuses because it is still keeping you warm like the actual outfit despite being an illusion? Normally, I'd say no, because most of the time you'd get a saving throw, but with the sleeves, your character doesn't get a save and has no reason to believe it isn't real [if he doesn't try to identify its aura at least, 'cause then he could believe it were Transmutation without it being such], so you would believe you are warm.
That sounds like an awesome way to freeze to death. Like, believing you are warm and actually being warm are two separate things. Or, similarly, that sounds like an awesome way to notice that you are wearing an illusion.
Gee, it feels like I'm wearing a swarm suit, why am I feeling all distracted and nauseated all of a sudden?