The iPhone Duo boasts an IP68 rating for dust and water resistance, outperforming Samsung's Galaxy Z Fold8 models which have an IP48 rating. Google's Pixel 11 Pro Fold also achieved an IP68 rating. The IP6X designation for dust means the iPhone Duo is completely sealed against dust ingress. Its IPX8 water resistance allows it to withstand submersion in water deeper than one meter. Specifically, Apple states the iPhone Duo can endure depths of up to six meters for thirty minutes. This IP68 rating matches that of other iPhone models and is significant for foldables where dust can damage hinges. However, Apple cautions that water and dust resistance are not permanent and can degrade with normal use. A future teardown by iFixit is anticipated to reveal more about the iPhone Duo's dust resilience. In addition to its water and dust protection, the iPhone Duo features other robust elements. These include a titanium frame, a titanium hinge cover, and a display constructed with ten layers.