To use your Sferra Catena King Sham, simply slip your pillow inside. When it's time to clean, machine wash it in warm water on the gentle cycle. Don't use bleach as it can weaken the fabric and make it turn yellow. Also, avoid using fabric softener. Wash dark - colored shams separately. Tumble dry on low heat and take them out while they're still a bit damp. If you need to iron, set your iron to the 'cotton' setting and iron on the reverse side of the fabric. This way, you can keep your shams looking great for a long time.