Introducing our new duvet fasteners: Designed to securely fix two duvets together, our new duvet fasteners come as a single piece that fits through the matching buttonholes, so there is no risk of your duvets coming apart during the night. You will receive a pack of 18 or 22 duvet fasteners in a lovely cotton drawstring bag. All Scooms duvets come with matching buttonholes so that any two Scooms duvets of the same size can be fixed together. So, if you wanted to add an extra layer of warmth to your 9 tog king size duvet, you could fasten it to a 4.5 tog king size duvet. How to use our duvet fasteners: Slide and push one fastener securely into one duvet buttonhole first. Then push the other side of the fastener into the matching buttonhole of the second duvet. (Rather than trying to insert the fastener into both duvet buttonholes at the same time.) Remember to remove the fasteners before you wash your duvet. Every Scooms all-season duvet set you buy comes with a full set of duvet fasteners, plus spares. If you need another pack of duvet fasteners, you can buy one here.