To use these pillowcases, simply slip your pillows inside. When it comes to cleaning, you can machine - wash them in cold water on a gentle cycle. Use a mild detergent and avoid using bleach as it can damage the fabric. After washing, tumble dry on low heat. Store them in a cool, dry place when not in use to keep them in good condition. Enjoy the softness and comfort these pillowcases bring to your sleep.