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.
What's best for cool sleepers, warm sleepers, and everything in between, according to experts...

Why is European Flax Linen the Best in the World?
Flannel
First, it’s important to consider the quality of your bedding. Find a reputable bedding manufacturer that offers high-quality, affordable bedding. High-quality bedding materials and workmanship are essential to ensure durability and comfort. Custom bedding fabrics are also a great option for those looking for a unique and personalized touch to their bedding.
What is the best way to select the proper bed sheets?