Using these Casey Cotton Fitted Sheet & Pillowcase Combos is a breeze. First, place the fitted sheet on your 40cm queen - size bed, making sure it fits snugly with the help of the tags. Then, put the pillowcases on your pillows. For a restful sleep, just slip into bed and enjoy the cool and breathable cotton. When it comes to maintenance, these sheets are easy to take care of. You can machine - wash them in cold or warm water. Use a mild detergent and avoid bleach. Tumble dry on low to keep the fabric soft and durable. Also, try to remove the sheets from the dryer as soon as the cycle ends to prevent wrinkles. If you iron them, use a low - heat setting. With proper care, these sheets will serve you well for a long time.