That is a pith helmet to go with the steampunky skirt.
This is a short and sweet re-fashion. I found a cheap old, not very nice pith helmet at a thrift store. Then I covered the whole thing in a coordinating green mesh and tacked it up under the brim. Then I sewed on the tulle which will match the blouse I wear with it.
I still feel light on accessories but this will have to do!