OtterBox offers three series of cases for the Samsung Galaxy S II Skyrocket and HTC Vivid. Device users can customize their case choice based on preference and lifestyle - Defender Series, Commuter Series and Impact Series now available at ATT retail locations, www.att.com and soon on www.otterbox.com Here is more info:
Defender Series: Serious protection. Those exposed to unforgiving environments find comfort knowing their device is enclosed in the three layers of the OtterBox Defender Series. The first layer is a built-in, scratch-resistant screen protector; layer two consists of a hi-impact polycarbonate shell and layer three provides a durable outer silicone skin. This case for the Samsung Galaxy S II Skyrocket and HTC Vivid comes with a holster-style swivel belt clip.
Commuter Series: Sleek, slim and stylish. The Commuter Series is the mid-level option of protection from OtterBox. It features a silicone inner layer with plugs protecting any exposed ports and is fitted with a supportive polycarbonate outer layer. Also included is a self-adhering screen protector, microfiber cleaning cloth and installation card for easy assembly.
Impact Series: Surprisingly strong. Intelligent engineering has led to the creation of this single layer, surprisingly strong case. Inner coring dissipates impact away from the Samsung Galaxy S II Skyrocket or HTC Vivid during bumps or scuffs. A self-adhering screen protector provides defense for the display and a microfiber cleaning cloth and installation card are included for flawless application.