The developers of the Invisalign system wanted to create an orthodontic treatment with minimal visual impact. They understood that some people don’t want to wear highly visible braces; they want a solution that can be worn with confidence, no matter what they’re doing.
Invisalign is not entirely invisible, but because it uses transparent retainers, it helps preserve your teeth' natural white appearance - something that braces do not do. What's more, you're free to remove your retainer (as approved by your dentist) - perhaps for that special occasion.