http://www.techradar.com/news/face-id-on-the-iphone-x-gets-fooled-again-by-an-affordable-mask

A couple of weeks ago we reported that Vietnamese cybersecurity firm Bkav fooled Face ID with a cheap mask, and now it’s repeated the trick even more convincingly.

Using a new mask apparently built for around $200 using materials such as stone powder and a 3D printer - which should be obtainable by most people - the researchers shot a video showing the iPhone X unlock for it.