From GameWatcher: “Although the post-apocalyptic setting of Fallout 76 focuses mainly on survival and rebuilding a ravaged world, nukes weren’t enough to wipe out people’s sense of style. The multiple formal wear items that can be found around Appalachia are proof of that.
Here are a handful of formal wear items that count towards Fallout 76’s challenges.”
Source: N4G PC Fallout 76 Formal Wear – What Items Count for Challenges