If you are handing a $500+ glass slab to a child and you don't put it in an Otterbox, you're essentially just scheduling a future appointment with the Genius Bar. It’s the industry standard for a reason: it works.
While the Defender series is the famous 'tank,' the newer Symmetry and EasyGrab lines offer a better balance for kids who want something that looks cool but still survives a drop onto a concrete driveway. It's a boring purchase that pays for itself the first time the phone bounces instead of shatters.

