Using these bedding combos is a breeze. Just put the fitted sheet on your King Single Bed 50cm, using the tags to make sure it's properly aligned. Then place the pillowcases on your pillows. For the best results, wash them in cold water on a gentle cycle. This helps to keep the fabric soft and maintain the 400 thread - count quality. Avoid using harsh detergents or bleach as they can damage the cotton. After washing, tumble dry on low heat. This bedding set is very durable, but try not to over - stretch the sheets when putting them on the bed to prevent any wear and tear. With proper care, you can enjoy these luxurious and comfortable sheets for a long time.