Henry Schein Dental’s Natural Elegance® I/O is an in-office whitening system with a 36% hydrogen peroxide formula that delivers excellent whitening in one 45-minute treatment. Its chemically activated formula requires no light, and the complete kit includes desensitizing gel and gingival barrier resin. A Natural Elegance I/O whitening procedure can be followed up with use of Natural Elegance Take Home Whitening Kits for easy, at-home maintenance. Features and Benefits :pH activated 36% Hydrogen Peroxide formula provides immediate result , Neutral pH is safe for enamel and reduces sensitivity. Syringe-to-syringe mixing system for 100% fresh mix. Immediate activation without light. Post-treatment gel contains potassium nitrate. Gingival barrier provides effective gingival isolation.