CES 2011: Speck ToughSkin & ToughShell iPhone 4 Cases Xavier Lanier01/07/2011 Speck introduced a pair of rugged iPhone 4 case at CES 2011. The ToughSkin has two layers of protection, including a rubber layer to soften drops. The inner layer of the case is rigid. The ToughShell has three layers of protection and is designed for those who abuse their iPhones the most, including first responders and those who work in rough environments. The Speck ToughSkin comes with a holster and will sell for $39.95.Advertisement The Speck ToughShell is relatively easy to assemble for such a protective case. It will retail for $49.95 starting at the end of the January.