So here's what I found
(picture is taken from Sephora.com)
Basically, it's a nail strengthener. Here's what it claims to do:
"This "Suit of Armor" creates a sheer pink coating that strengthens and hardens natural nails so they grow beautifully long and strong. Its keratin-rich formula includes an optical brightener that filters out any yellow appearance in your nails, bringing out the natural color in your nail bed and making the whites of your nails appear whiter."
Has any of you tried it? What do you think? And how does it look on the nails? as a clear nail polish with a bit thicker consistency or as gel-overlays.