Using your Sferra Celeste King Bottom Fitted Sheet is easy. Just fit it onto your king - size mattress with the 17 - inch depth. For a great night's sleep, make your bed as you normally would. When it comes to maintenance, remember to machine wash it in warm water on a gentle cycle. Never use bleach because it can damage the fabric and make it turn yellow. Also, don't use fabric softener. Wash dark - colored sheets separately to prevent color bleeding. Tumble dry on low heat and take it out while it's still a bit damp. If it needs ironing, use the “cotton” setting on your steam iron. Follow these steps, and your sheet will stay in great shape for a long time.