Originally Posted by Banditx
No clue. I'd maybe say be able to move if they're in the wind.
With that in mind, I think making each feather out of Fabric and creating pockets along the sides of them for guide wires would work. My thought is that it would be almost like a tent, that is to say, a collapsible rigid frame and then a fabric covering that the rigid frame slides into to give it form. This would allow the feathers to blow in the breeze to a point, but also allow it to collapse during travel so as to not take up a lot of room. The fabric would also keep them light so as to not strain the back. Another plus of this method, that, if sewed right, the feathers could be washable, thus allowing them to stay white after multiple uses.