The evo check case for the htc one m9 is the next stage in the evolution of impactologytrade and intelligent impact protection using scientifically proven hybrid impact protection material flexshocktrade impact force is absorbed dissipated and repelled away from your device evo check is ultra thin super lightweight and offers ultimate impact protection whilst preserving and enhancing its natural beauty encasing the corners and back of your device to provide a secure fit and feel with a raise