How does Invisalign work? Learn about how Invisaligns clear aligners are an alternative to metal braces and can help you achieve the smile you deserve. Your Invisalign® clear aligners are custom-made for you. The aligners are virtually invisible and fit snugly over your teeth. Each aligner shifts your teeth slightly, moving them horizontally and vertically and even rotating them when needed. Your aligners are engineered to use the right amount of force in the right place at the right time. When you change to the next set of aligners (typically every 2 weeks) your teeth gradually move into position, following a custom treatment plan mapped out by your doctor. Only Invisalign clear aligners are made of proprietary, multilayer SmartTrack® material to gently shift your teeth into place.