While sateen sheets are similar to satin sheets, they aren’t to be confused with one another. The satin weave structure (one under, three over) creates sateen sheets, but yarn is used rather than filament fibers. Despite the differences in material, sateen sheets are just as elegant and silky smooth as satin. They are less durable than percale sheets but also better for cold sleepers and cooler weather. 

 Flannel sheets, on the other hand, are great for keeping warm during the colder months. Flannel sheets are made of cotton or wool and are known for their softness and insulation.  When choosing flannel sheets, pay attention to the weight of the fabric, as heavier weights are generally warmer and more durable.  Choose flannel sheets that weigh 5 ounces or more for a comfortable and long-lasting option.