Using these Casey cotton sheet sets is a breeze. Just put the fitted sheet on your single bed (40cm) and use the tags to make sure it's the right way around. Then add the flat sheet and your favorite pillowcases. When it comes to washing, use a gentle cycle with mild detergent. This will keep the high - quality fabric in good shape. Don't use bleach as it can damage the cotton. You can tumble dry on a low setting or let them air dry. Avoid over - stretching the sheets when putting them on the bed to maintain their fit. With proper care, these sheets will last you a long time and keep you comfortable night after night.