Unlike other woven fabrics, silk isn’t measured by thread count, but by momme. Momme is a Japanese unit of weight measurement. A higher momme means a thicker/heavier silk, which also can indicate quality level.

Most pure polyester sheets are rough, while polyester blends tend to be much softer and provide a higher level of comfort. These sheets are easy to wash, wrinkle-resistant, and often quite affordable. If you’re looking for sheets you don’t need to steam or iron, polyester will be your best friend.