We recommend and sell only the Otterbox line of iPhone Cases.  We have found them to be the best protection available for the iPhone.
The OtterBox Defender Series™ for iPhone™ 4 Your iPhone® 4 has become a big part of your life. With FaceTime video, retina display, multitasking, HD video recording and more—you’ve got a lot to lose. You won’t find a tougher case than the OtterBox Defender Series for iPhone 4. This three-layer case will keep your precious iPhone safe from drops, scratches, bumps and dust. Relax, we’ve got the iPhone 4 covered.  Now also available in a variety of colors, even dual-tone options

The OtterBox Commuter™ for iPhone™ 4 With all of the new features the iPhone® 4 has to offer, you definitely want to protect it. The OtterBox Commuter Series case for iPhone 4 is what you need. With three layers of protection (including a self-adhering screen protector), worrying about scratches, bumps and shocks will be completely unnecessary. Nothing beats OtterBox cases when it comes to quality and toughness.Now also available in a variety of colors, even dual-tone options

The OtterBox Defender Series™ for iPhone™ 3G / 3GS offers stylish and sophisticated protection in 3 layers. First, a thin, clear membrane covers your Touch Screen to help prevent scratches and dings. Second is a hard, strong Polycarbonate skeleton that surrounds your device. Wrapped around all of this is a Silicone skin that absorbs bump and shock. Included with the case is a ClipStand holster.  Additionally, the Defender Series has an optional armband available so you can safely take your iPhone with you when you go out running, biking, or hiking!

Interactive and trend-setting, the OtterBox Commuter™ Series for iPhone™ 3G/3GS includes 3 slender, yet sturdy layers to safeguard your precious smartphone. First, a self-adhering clear film protects your touch screen from scratches. Second is a soft, silicone skin that wraps around your device. Finally, a one-piece, custom molded polycarbonate shell hugs tightly around the silicone. While in the case, all functions of the iPhone remain fully intact. Plus the silicone plugs provide access to all ports while keeping out dust and debris when not in use. This case was designed to slide easily in and out of your pocket or purse.