https://www.androidauthority.com/sony-confirms-no-xperia-z6-x-series-unofficially-water-resistant-676238/
Sony confirms no Xperia Z6, X series unofficially water-resistant - Android Authority
Feb 24, 2016 - As suspected, the new Sony Xperia X Performance will replace the Xperia Z6. The Xperia Z5 is the last generation of the Xperia Z series.
xperia z6