To use this duvet, simply place it on your super king - sized bed. It'll instantly transform your sleep experience on cold nights. When it comes to care, it's best to have it dry - cleaned occasionally to keep it in top shape. Avoid using harsh detergents as they can damage the down and feather filling. Also, don't expose it to direct sunlight for long periods, as this can fade the fabric. Shake it out regularly to help the filling stay fluffy and maintain its softness.