Using your Casey Cotton Fitted Sheet & Pillowcase Combo is a breeze. First, find the tags on the fitted sheet to ensure it's placed correctly on your single 40cm bed. Then, put the pillowcases on your pillows. For the best results, wash these sheets in cold or warm water on a gentle cycle. Avoid using bleach as it can damage the high - quality cotton. After washing, tumble dry on low heat to maintain their softness and durability. If you notice any wrinkles, you can iron them on a low - heat setting. With proper care, these sheets will keep you comfortable for a long time.