"Chiếc áo khoác tàng hình có tồn tại không?"

Translation: Does the invisibility cloak exist?

[Asraelite]

Yes, but good look finding it

[CJGfsy]

is this really an important adjective to know? come on...

[Mu6OVm]

In my case the chances is that I will use this more often than all this corporative/coaching vocabulary from previous previous lessons.

[StewartMM]

"Do invisibility coats exist?" if we're talking about generic invisibility cloaks is better.

[Chris-Owen]

Google says cloak is "áo choàng" and not "áo khoác".

[Dan553966]

We don't usually say "invisibility cloak". We say "cloak of invisibility," don't We? I knew what the sentence meant but was hesitant to answer anything except "invisible".

[Huy_Ngo]

I googled it up and both phrases appear:

[TehVanarch]

As a fan of fantasy games I'd say they're both generally acceptable. Some other examples:

http://elderscrolls.wikia.com/wiki/Flame_Cloak vs https://pathofexile.gamepedia.com/Cloak_of_Flame

http://aqwwiki.wikidot.com/behemoth-blade-of-shadow vs https://dota2.gamepedia.com/Shadow_Blade

It's a stylistic choice in the end, oftentimes it's [noun item] + [item of noun]

[Mu6OVm]

And how I would say if I have an invisible coat?

[Asraelite]

I'm not a native speaker so someone correct me, but I think "tôi có một chiếc áo khoác mà tàng hình", where "mà" means "which", i.e. "a coat which is invisible".