Ready. Set. Go! Opalescence Go™ prefilled whitening trays pair professional strength teeth whitening with unrivaled convenience! The innovative UltraFit™ tray easily conforms to any smile and is ready to use right out of the box. It’s fast. It’s simple. It's effective. Your search for the perfect teeth whitening solution is over. Opalescence Go Teeth Whitening Features: No impressions or molds are required It’s ready to use right out of the box The UltraFit tray conforms to any smile Available in 10% hydrogen peroxide (wear 30–60 minutes for 5–10 days) Available in 15% hydrogen peroxide (wear 15–20 minutes for 5–10 days) Teeth whitening gel contains potassium nitrate and fluoride for patient comfort Two flavors: Melon and Mint Vegan—no animal products used Certified gluten free Certified kosher *BRAND NEW. SEALED. NEVER OPENED.