Thread count is another important factor to consider when choosing flannel sheets. While the higher the thread count of regular cotton sheets, the better the quality, with flannel sheets, this is less important. Instead, focus on the fabric weight and overall feel of your bed sheets to gauge their quality.
In most cases, a duvet cover is constructed by stitching together two rectangular sheets of cloth on all four sides. One sheet is then cut lengthwise along the center, allowing the duvet to be fitted within the cover once it has been folded. Additionally, high-end duvet covers include ties at each corner, which allow the duvet cover to be fastened to the duvet at each of the four spots where it is tied. This design prevents the duvet from being bunched up within the cover.
Other fabrics like bamboo, Tencel, or other semi-synthetics are temperature-regulating, meaning they maintain a naturally cooler temperature and adjust with your body temperature. These are fantastic for keeping cool when it’s hot — especially because they are often moisture-wicking, too.

