Beginner transmoger question

[Thargar-grim-batol]

So I’ve recently started getting into and collecting transmogs, the character I’m playing now is a Enhansement Shaman and I’m using the addon AllTheThings.

Sometimes when I loot a piece of gear that I can put on, either leather or mail, the addon says it’s not collected and I also don’t see that piece of gear at the transmogifier.

Is it so that some gear “belongs” to other classes and because of that I, as a shaman, can’t add it to my appearance collection?

I recently got Passive Resistor Spaulders, that I think would look amazing on my shaman, but that item does not get added to my collection even though I can wear it.

[Papudeath-outland (Papudeath)]

As a shaman, you can only collect transmog appearances for mail armor and for the weapons your class can use, so yes, you cannot for example collect leather or cloth transmog.

As for Passive Resistor Spaulders in specific, it’s a leather item meaning you cannot transmog it on your shaman, or collect the appearance.