To use your Sferra Giza 45 Stripe Queen Duvet Cover, simply put your duvet inside it. When it's time to clean, machine wash it in warm water on a gentle cycle. 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. You can steam iron it on the 'cotton' setting to keep it looking great.