Patented Dual-Activation Technology for Unmatched Comfort & Results. Patented instant activation dual-chamber formula Formulated to reduce hypersensitivity and strengthen tooth enamel. Highly effective 12% Hydrogen Peroxide gel with no sensitivity. Visible results in as little as 5 days with only 12 minutes of daily wear time. Guaranteed to have a long shelf-life. Patented mouthpiece that is comfortable, adjustable, and flexible.