The creator tags have migrated. All "prompter" and "artist" tags have been migrated to "creator". Please check your watched tags, as they might have disappeared from your watch lists due to the change.
The slight corners on the edge of the hat make me think it is built on a frame like an umbrella, but with a ring he the center, rather than a pole. It also looks like the cloth is thick enough to keep it from easily blowing away. If we assume this version still has the super-strength of an Earth Pony it looks like a reasonably practical way of dealing with rain.
I’m getting Ranni the Witch vibes from the outfit.
Edited because: Spelling