In the video, Blomdahl talks through her bed-making process, including air-drying her sheets in the cool breeze outside. She uses one fitted sheet before adding two snuggly single duvets next to each other. If you still want the bed to look like one unified double, you can then place a double throw or sheet on top.
Article source: https://www.huffingtonpost.co.uk/entry/swedish-bed-making-hack-better-sleep_uk_638090d5e4b0e4c77591aab9