In A Nutshell
Anker’s Ultra Protective Case is currently the best dustproof iPhone 6 case. It features a built-in screen protector and raised edges to prevent phone damage, and port protectors to keep out dust. It fits the iPhone 6 and the iPhone 6s.
This ultra-protective case is Anker’s answer to the wildly popular Otterbox smartphone cases. For half the price you get a case that is just as durable as the Otterbox, but is also much slimmer. The Anker Ultra Protective Case adds just .15 inches and 1.6 ounces to your phone, while the Otterbox Defender is 1.7 inches thick and weighs 1.92 ounces. The Anker also has an 18 month warranty, which is six months longer than Otterbox’s 12 month warranty.
Attaching the case to your phone is incredibly easy. Anker’s precision cutouts are engineered to just snap on to the iPhone 6 / 6s. It is a two-part case with a built in glass screen protector. The back of the case has a tactile grip that feels secure in your hand. The front has raised edges to prevent drops, though Anker claims the phone is drop tested 6 times from 3 feet. Customer reviews confirm that the phone does survive drop tests.
Button and port guards ensure that dust does not enter the phone via the charging and headphone openings. They are a bit of a pain to latch back up, but open easy enough. Unfortunately, the case is not rated to be completely waterproof, although the port guards do prevent water from entering.
Currently, Anker only offers three color options, so it they are lagging behind the competition in terms of variety. The case does not have a circular cutout to display the Apple logo, which is either a good or bad thing, depending on your preference.
If you want a dustproof iPhone 6 case that is also completely waterproof, check out the LifeProof Fre case. The FRE meets IP68 standards, which means it is completely dustproof and is fully submersible to 2 meters of water for 1 hour. The Fre also has a MIL STD 810F-519 rated, which means it can withstand drops of 6.6 meters.
Expect a trade-off in functionality for the waterproof rating. The Fre requires an extension cord to use most headphones, and reviewers note that the mute button often fails.