In the 1980s, the Emmanuels jokingly drew an outfit for a visit by Princess Diana to the Middle East consisting of a burqa with a large bow. The outfit was never made but whilst not the same, I have used the concept here for a Second Life outfit for those wanting a fully enveloping set of robes.
The outfit is mostly rigged mesh so cannot be altered but by clicking the robes you can set the usual one of five sizes. But considering how enveloping they are, I would be surprised if there is a mesh avatar that these don't totally submerge.
The bows, faceveils and muff are prim and can be removed or moved as required.
Click on the robes for a menu of control options, and on the face veil to set its density.
IM me if you would like these robes in another of my usual textures.
See item in Second Life