About this item - NOTE: these are brand new and i only have 2 boxes left that exp. 3/31/2025. Hence the new.discounted price (or feel free to make me an offer). Opalescence Teeth Whitening: Easy to use, without LED lights, activated charcoal, or other fads 10% Teeth Whitening Kit: Whitens teeth chemically, using hydrogen peroxide Dental Care: Gluten free; kosher; sweetened with xylitol, which may reduce the risk of tooth decay Made in the USA: Opalescence products are made in the USA from globally sourced materials The perfect alternative to store-bought teeth whitening, Opalescence Go whitening provides our teeth whitening gel in comfortable, ready-to-go trays that conform to your smile. It's the best way to brighten your smile on your time. UltraFit Trays Since the disposable UltraFit trays conform to your smile, you don't have to worry about the time or cost of having custom trays made. And the UltraFit trays are ready to wear right out of the box! Easy to Use It honestly doesn't get easier than this. Simply wear the UltraFit tray for 30 to 60 minutes, then throw the tray away. That's it! Professional Whitening Made Easy At Opalescence whitening, we design our products to give you the professional teeth whitening results you want with an easy, comfortable whitening experience. Mint Flavor You don't have to worry about bad-tasting whitening gels anymore. Opalescence Go whitening is available in a delicious Mint flavor.