Clear aligners are discreet, removable alternatives to traditional metal braces. When you get these custom-made, clear plastic aligners, you'll receive several months' worth in advance, and you'll change them out at regular intervals (usually about every two weeks) to help shift your teeth into the proper position. The entire series of aligners could take up to nine months or longer, depending on the amount of alignment needed.
It is important to note that the American Dental Association discourages getting clear aligners directly from manufacturers in what's being called Do-It-Yourself (DIY) Orthodontics. Moving teeth is a medical procedure that should be done with the supervision of a licensed professional.
Learn more about the differences between clear aligners and braces.