OVERVIEW: Tech21 Evo Check Series Flexible Gel Case for Apple iPhone 13 Smartphones. Blue version. Get ready for the drop with a classic blue Evo Check Tech21's most innovative iPhone 13 case. Made with our exclusive impact material FlexShock, this case keeps your device fully protected from multiple drops and comes with extra buttons to mix up the colors. KEY FEATURES: FlexShock multi-drop protection: 16ft (4.9m) Enhanced camera protection Interchangeable buttons