Opalescence Go are pre-filled whitening trays which are a convenient and cost effective at home whitening solution. It’s fast. It’s simple. It’s effective. The trays easily conform to any smile and ready to use right out of the box. There are 10pkts individually wrapped upper and lower trays. Active ingredient is Hydrogen Peroxide (6%), the solution also contains potassium and fluoride for patient comfort. Wear for 60 - 90 minutes, use for 5 - 10 days. To maximise results it is recommended to use after brushing and before bed. If sensitivity occurs, stop use.