Opalescence Go Pre-loaded Whitening Trays, Hydrogen PeroxideTHIS PRODUCT IS ONLY SHIPPED WITHIN THE UNITED STATES Opalescence Go Pre loaded Whitening Trays, Hydrogen Peroxide Opalescence Go is newest and most comfortable way to get professional whitening treatments whenever you want. Everything is pre made and pre loaded, all you have to do is put the tray in, and wait! Developed with better fitting waxed trays, Opalescence Go uses ultra strength Hydrogen Peroxide to whiten your teeth in the quickest way