Using your Casey Cotton Fitted Sheet and Pillowcase Combo is a breeze. First, simply put the fitted sheet on your king - sized 50cm bed. The tags on each side will help you place it correctly. Then, slip your pillows into the pillowcases. For the best results, wash these sheets in cold or warm water. You can use a regular detergent, but avoid using bleach as it may damage the high - quality cotton. Tumble dry on low heat to keep the fabric soft and durable. After drying, you can iron the sheets on a low - to - medium setting if needed. With proper care, your Casey Cotton bedding will last you a long time and continue to provide a comfortable sleep environment.