05-04-2016 08:44 AM
05-04-2016 08:49 AM - edited 05-04-2016 08:53 AM
what guy in video is referring too is probably the filter layer that is glued/heated onto back cover from inside that is the dust discharge plate it prevent's most of dust from being sucked into laptop so it get's less dust inside than what most laptops that does not have one will get more dust inside.
P.s correct me if i got this all wrong.
Also if that is it then yes lenovo x1 carbon 3rd gen has one .