Opalescence Take Home Whitening Gel offers sustained whitening power in the comfort of your own home. Available in Mint, Melon, and Regular flavors, Opalescence Take Home Whitening Gel is delivered via custom-made trays, further tailoring the treatment to your smile. It features PF for reduced sensitivity and cavity-control, and is available in formulations of 10%, 15% , 20%, and 35% carbamide peroxide, with wear-times ranging from 30 minutes to overnight.