Custom layered clothing makes NPC float (blender)

Title says it. I made this …uhhh weird robe dress… thing (will be pants underneath) and when I put it on the npc he floats after i move him. I can just move arrow him back into the ground but there’s a chance i want to use this dress thing for characters later and i dont want people running around a foot off the ground. I’ve seen other topics about mesh buildings causing things to float but not accessories… is there a simple thing I can do in blender to fix it?

bump would even accept and attempt guesses at this point