Water resistant articles

The Sony Xperia Z5 has, at least on paper, everything you'd want from a high-end smartphone. There's a 23-megapixel camera on the back with "Hybrid Autofocus", a 5.2-inch 1080p display powered by a Snapdragon 810 SoC, microSD support, fingerprint reader and two days of battery life in a 7.3mm thin water resistant body. But...