The display cover on the Apple Watch Sport is made from aluminosilicate glass. Marketed as Ion-X, Apple describes it as being “fortified at the molecular level through ion exchange, with smaller ions being replaced by larger ones to create a surface layer far tougher than ordinary glass.” The more expensive Apple Watch uses a sapphire display, a incredibly hard material that boasts a high level of scratch protection. So just how scratch resistant is the Ion-X display of the Apple Watch Sport? Unbox Therapy managed to source the display cover through Sonny Dickson, who has a history of sourcing authentic parts before products begin shipping from Apple.

It fares well against keys, knives and even steel wool. Provided you don’t take any sandpaper to your Apple Watch, you’ll be in good shape. If you’re still concerned, there are options including cases or screen protectors.