180
Report: Apple is testing foldable iPhones, having the same problems as everyone else
(arstechnica.com)
This is a most excellent place for technology news and articles.
Their screen is glass under the screen protector and OLED display. So like most phones out there with a screen protector.
As for durability, I have washed and dried my phone in the laundry and dropped my phone going 60mph out of my pocket while riding my motorcycle. Granted I have a case, but still. I'm currently using it to reply to your incorrect message.