Easy, Safe & FastThe Natural Way to Whiten Safer concentration of whitening agents than other brands. Contains all-natural remineralizing ingredients Whiten Teeth in About an Hour! Whitening TechnologySpry White with PeroGel & patented Viocin Whitening Technology uses a two-stage process. Step One - PeroGel starts by removing minute particles embedded in the tooth enamel that cause discoloration.Step Two - Viocin enhances the whitening effects while infusing calcium ions back into the enamel to reduce sensitivity and protect the teeth. Viocin Uses light spectrum technology with violet gel to whiten teeth. Contains dentist recommended Xylitol. Formulated for sensitive gums & teeth. Dentist Recommended Xylitol Contains all-natural Xylitol. Dental associations worldwide are promoting xylitol because of its oral health benefits. Xylitol has a cooling and soothing effect, making it an ideal addition to the teeth whitening process. Contents.4 fl oz - 1.5 mL PeroGel Applicators.4 fl 0z - 1.5 mL Viocin Applicators2 - Moldable Trays1 - Tray Case