To use this Sferra Catena duvet cover, simply place your duvet inside. When it's time to clean, use a gentle cycle in warm water. Avoid using bleach as it can weaken the fabric and cause yellowing. Also, don't use fabric softener. Wash dark colors separately to prevent color bleeding. Tumble dry on low heat and take it out while it's still a bit damp. For ironing, set your iron to the 'cotton' setting and iron on the reverse side of the fabric.