For all-day, take-anywhere protection, the black Case for the iPhone 4/4s from Lifeproof makes a great choice. The case has a full IP-68 rating against water and dust, and is designed according to military specifications. It will guard against shocks and impacts to your phone, and remains fully sealed against minute dust particles. You can even take it underwater during trips to the beach or pool. While offering unsurpassed protection, the case itself only adds a scant 1/16" to your phone, so it won't add much bulk when you're carrying it around.
You can feel free to continue using the built-in camera on your iPhone as well -- the case has double AR-coated (anti-reflective) optical glass lenses for unprecedented crystal-clear photo and video quality. Plus, you can benefit from access to all phone features while it's inside the case. The case also improves the bass and mid-frequency speaker response by utilizing the back of the case as a sub-woofer for a richer, fuller sound. To sweeten the deal, Lifeproof has included a bonus headphone adapter and keeper for the headphone jack cover along with this rugged case. The Case for the iPhone 4S/4 is backed by Lifeproof's 90-day warranty and can be extended to one-year by registering the product with Lifeproof.
Ingress Protection (IP-68) rating against water and dust
Tested to military specifications MIL-STD-810F-516.5 (2 meters/6.6ft drop on all surfaces and edges. 26 tests)
Sealed protection against minute dust particles
Ability to swim and take underwater (2 meters/6.6ft depth)
Ultra-slim; adds only 1/16" (1.5 mm) when measured from the center of the phone
Weighs less than an ounce (28 g)
Unique combination of materials that will not stick to your pocket
Double AR-coated (anti-reflective) optical glass lenses provide unprecedented crystal-clear photo and video quality
All phone features are operational while maintaining a high level of protection
Improves the bass and mid-frequency speaker response by utilizing the back of the case as a sub-woofer for a richer, fuller sound
Includes bonus headphone adapter and keeper for headphone jack cover
Optional Swimming Headphone Adapter allows use of waterproof headphones underwater