Why are some backpiece items not skinnable?
Which backpiece items don’t have a wardrobe skin? Are you sure they don’t, or do they just not show in the wardrobe until you have the skin? I read that some of the quaggan hats, for example, don’t show until you actively get the skin.
If you’re wondering about items like the Forest Brace, it wouldn’t unlock because it has no skin at all, it’s purely for stats.