Slendertone face uses electrotherapy to gently and effectively exercise the muscle of expression to tone and lift the face by increasing circulation to your facial muscles slendertone face rejuvenates your skin improving its clarity and radiance tone the muscles lift the face muscles are the foundation of your face and as with all muscles they need regular exercise to remain firm and toned slendertone face gently stimulates your facial muscles to add volume and combat the natural sag