Winter's Presence Shoulders and outfits
that’s because it’s an item skin, and all item skins are hidden when you use an outfit. it’s an outrage that people have complained about since day 1 but anet has yet to even give their stance on the matter.
Popular consensus: Make effects auras that can be equiped in a seperate slot.
current auras would include:
Wintersday Presence
Nightfury
Glowth from Gorseval and some others
Beehive
Chack Spores (whatever they were called)