Y'know, it just occurred to me: So far, four out of the mane six have their own unique stealth suit. We first had Ninja Dash in Read it and Weep, then we got Solid Sparkle in It's About Time. Pinkie got a suit in IAT too, but got a different, unique one in The Crystal Empire Part 1. And now we have this adorable little getup.
Now we need episodes where Rarity and Applejack have to be stealthy. ^_^