What does "wrinkle resistant" mean?

Wrinkle-resistant fabrics are designed to help prevent or reduce wrinkles and creases, keeping your sheets and blankets looking smooth and tidy with minimal effort. Even after repeated washing and use, these materials are less likely to wrinkle, so you typically won’t need to iron your bedding. For best results, remove items promptly from the dryer and place them on the bed—or fold and store them—right away.