Using these Casey cotton flat sheets is easy. Just put them on your king single bed and enjoy a great night's sleep. When it comes to washing, use a gentle cycle with mild detergent in warm water. Avoid using bleach as it can damage the fabric. Tumble dry on low to keep the sheets soft. After drying, you can iron them on a low - heat setting if needed. Store the sheets in a cool, dry place to keep them in good condition.