A device for disrupting flow through a fistula may include a woven textile having a compressed state and an expanded state. The woven textile may include, in the expanded state, a neck, a first bulb coupled to a proximal side of the neck, and a second bulb coupled to a distal side of the neck. The neck has a first braid angle. The first bulb may have a second braid angle greater than the first braid angle. The second bulb may have a third braid angle greater than the first braid angle.