User blog comment:Xilinoc/Ch. 585 - The Headless Star 4/@comment-24577094-20140618164118

So we finally get the link between Shutara: the Guardian of Weaving, and the Shutara Barrier mentioned at the beginning of this arc. It's all but explicitly stated that she has the power to get through all of those barriers (as well as break into Kurotsuchi's lab) and grant that power to others through their clothing. I imagine she also may have created the barriers in the first place, which may be what allowed her to break them.