Optico wipes, when properly packaged and stored (in a cool, dry place away from direct sunlight and extreme temperatures), do not have an expiration date and are manufactured to have an indefinite shelf life. Should you ever encounter wipes that are dry in your box, then it could mean that...

Optico wipes should be stored unopened in their individual foil wrappers, in a cool and dry place, and away from direct sunlight and extreme temperatures until the moment of use.