Using this Sferra Catena flat sheet is easy. Just put it on your full or queen - sized bed. When it comes to cleaning, machine wash it in warm water on a gentle cycle. Avoid using bleach as it can weaken the fabric and cause yellowing. Don't use fabric softener either. Wash dark colors separately. Tumble dry on low heat and take it out while it's still damp. If you need to iron it, set your iron to the 'cotton' setting and iron on the reverse side of the fabric. This way, you can keep your sheet looking great for a long time.