This might be the new case I buy for my iPhone 3GS! It’s built like a tank.
The OtterBox for iPhone™ 3G / 3GS Defender Series™ 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. This case will not fit the 1st Generation iPhone.