Opalescence Go 15 prefilled teeth whitening trays are the answer for your patients who desire the best teeth whitening experience no matter where they go. Opalescence Go 15 teeth whitening trays can be carried in a pocket or bag and worn right out of the package. The UltraFit tray is made of a discreet material designed to maximize comfort and is prefilled with the optimal amount of teeth whitening gel. This makes it possible to whiten when and where you want. With no need for impressions, models, lab time, custom trays, or LED Lights, Opalescence Go teeth whitening trays are easy and convenient. Once you receive your kit, refrigeration is required. Keep Opalescence Go teeth whitening trays stored in a refrigerated environment between 36 F (2 C) and 46 F (8 C). Not only is it effective, flexible, and convenient, it\'s vegan, no animal products are used. It is also certified gluten free and certified kosher, so it fits in with diverse lifestyles and beliefs. The innovative UltraFit tray is made of a unique, highly adaptable material that comfortably conforms to any smile. It also provides superior coverage whitening the entire smile and ensuring maximum whitening gel remains on the teeth. With over 30 years of experience, more than 50 teeth whitening awards earned, and over 100 million smiles brightened. The name Opalescence teeth whitening is synonymous with quality. Opalescence teeth whitening gels, trays, syringes, and toothpastes are manufactured in the USA from globally sourced materials.