Tech21 Evo Check Samsung Galaxy S8 Plus Evo Check is ultra think and lightweight while offering advanced protection and full access to all ports and functions. FeaturingFlexShock, the Evo Check is up to 30% slimmer and 60% lighter than other cases and offers advanced impact protection from drops of 2m/6.6ft. And thanks to FlexShock, the case will never interfere with signal quality, Wi-Fi or sensors.