Twill:Twill is a style of weave which uses diagonal parallel ribs, which are created by passing the weft thread over one or more warp threads and then passing it under two or more warp threads. This creates a visual diagonal line pattern on the fabric, as well as making the fabric sturdy and drape nicely.
Hospital Sheet Sets
What Sheets Are Good For Hot Weather?
Size

Look for a thread count of at least 400 for better quality satin sheets, but do remember they are one of the more fragile options, and some are even dry clean only.
Bed sheets are a specific type of bed linen that directly come into contact with your skin. Consisting of fitted and flat sheets, they provide a barrier between you and your mattress or duvet, ensuring a comfortable, hygienic sleep environment.
Cotton is probably the most common fabric used to make sheets and bed linen. Cotton is natural, breathable, biodegradable and feels great next to the skin. There are many types of cotton. The two best quality cottons are Egyptian cotton and Supima cotton.