Three cases that keep your iPhone's delicate parts protected.

The Incase Frame Case ($29.95, www.goincase.com) is a hybrid of the injection-molded Incase Protective Cover and a hard-shell plastic case, fitting your iPhone 3G firmly, while making it easy to grip and protecting the phone with a translucent back panel made of durable plastic. Available in muted cyan, vivid green, and vivid orange.

It's like one of those safety vests that highway workers wear, only for your iPhone and with actual protective properties.

You can feel safe knowing your phone is protected by the Incipio duroSHOT ($24.99, www.myincipio.com), a three-part case made of flexible silicone, hard plastic, and a clear screen-protecting film that’s easy to apply and is the least prone to bubbling up of all screen films we’ve tried.

One case, three layers of protection.

If its resemblance to a tractor tire is any indication, the Speck ToughSkin for iPhone 3G ($34.95, www.speckproducts.com) offers plenty of protection. It even lets you dock your phone without removing the case—so your iPhone can remain eternally armored.

Like wrapping your iPhone in a rubber-tire tread.