To use these Casey Cotton flat sheets, simply put them on your king - sized bed. Make sure the corners are well - tucked for a neat look. When it comes to washing, use a gentle cycle with mild detergent in warm water. Avoid using bleach as it can damage the fabric. After washing, tumble dry on a low setting. These sheets are designed to last, but it's still a good idea to not over - stretch them when handling. With proper care, you can enjoy their comfort and luxury for a long time.