The game has 90 unlockable Outfits, most of which can be obtained by exploring the wasteland or from normal cards from Lunchboxes. Rare and Legendary Outfits may be obtained from Legendary Dwellers or as Rare/ Legendary pulls from Lunchboxes. Common Outfits are colored green, rares appear as blue, and Legendaries appear as yellow.
Outfits provide the much needed stat boosts for your dwellers. This will help them perform their jobs better and you may need to swap outfits between your dwellers in the early parts of the game.