so you can wear a maximum of 3 of each category, but not of multiple categories
for example: you want to put a bandana and shades on (two face items) and you can, but that means you cannot then have more than 1 hat on, or one neck item, etc. You can still have a maximum of 11 hats but instead of the "hat" part being the only one you can have 3 of, you can instead choose
-aueo |