Uh.

[That's one of the things Garrus doesn't tend to keep on him, though he touches an armor compartment anyway as if the device he'd bought would materialize.]

If we walk back to my rover I can grab the one I own, show you, or I could attempt to explain. Just won't be a very satisfying explanation.

[Not with the tech level of her world being what it is.]

Basically makes you invisible to the eye, some tech.