Kotex does not have a formal expiration date policy for their products, but they do recommend using them within a certain time frame for optimal quality and effectiveness. Most Kotex feminine hygiene products, including pads and tampons, have a shelf life of approximately five years when stored in a cool, dry place away from direct sunlight. Users can typically find a "best by" date printed on the packaging, which is a guideline for when the product will perform best. After this time period, the product may still be usable, but it may not be guaranteed to provide the same level of protection or comfort as intended. For specific questions or concerns regarding expiration or usage, it may be helpful to refer to the product packaging or visit the current Kotex website for additional product information.