Extreme Duvet Cover is a great addition to the Opalo bedding set. You can insert your duvet inside this bag and close it with a zipper. Then just crawl under and have a nice sleep :)
 
A duvet cover of 150 cm x 210 cm made of 700g Opalo weighs 4,5 kilograms and I believe a 1000g variant will weigh 6,5 kg! These are rather heavy (which is good or bad depending how you like it) :)
 
The Opalo fabric used here is
very shiny
super sturdy
easy to keep clean
 
Available in all colours and weights.
 
You may choose from the predefined standard sizes or choose your own. 
 
Warning: Do not mix black colour with any other colour! The black will stain the other colours.