Thread count is the number of threads woven into a square inch of fabric. This count is found by adding the number of warp (vertical) threads and weft (horizontal) threads. The more threads, the tighter the weave, the higher the density, and the more durable the fabric.

No, not all sheets have a thread count. Thread count is generally reserved for sheets made from cotton, especially from long-staple cotton like Egyptian or Pima. The higher quality the cotton fibers, the more information the thread count gives about the durability and feel of cotton sheets. Some cotton sheets like flannel and jersey knit do not have a thread count due to their construction.

Though other natural or semi-synthetic fabrics like linen or rayon from bamboo may provide a thread count, these fabrics rely more on breathability and fiber caliber. A good thread count for linen sheets is significantly lower than what you would find for cotton sheets and doesn’t really tell you much about quality or fabric feel.

Occasionally, fabrics like microfiber are advertised as having a high thread count, but this is primarily a marketing tool. These fabrics are made with extremely thin synthetic fibers, so more threads can be packed into a square inch. However, it is the thread quality that makes the real difference in feel and durability, so a high thread may sound impressive, but doesn’t give much meaning.

Though thread count is generally a good indication of a cotton sheet’s quality, it isn’t always better to have a higher thread count. To identify whether a higher thread count is good, or at least good for you, you have to determine what you want in a set of sheets. Though a higher thread count generally means the cotton will be smooth and durable, it can also be much heavier. With higher thread count sheets (over 800TC), fibers are often twisted together to create double-ply yarn, automatically boosting the thread count. In this case, the fabric won’t be any smoother or higher quality, but it will be heavier and less breathable.

Here's a quick guide to thread count (TC).

Less than 200 TC: thin, low-quality, possibly scratchy

• 200-400 TC: Ideal for cotton percale, creates a crisp feel and breathability
• 300-600 TC: Ideal for long-staple cotton, creates a smooth but breathable fabric. Also good for cotton sateen for a smooth feel.
• 600+-800 TC: Seen in long-staple cotton sheets. Heavier and less breathable than sheets with a lower thread count. Can be a good thing if you live in cooler areas.
• 800+ TC: Usually made with double-ply long-staple cotton. Extra heavy, strong, traps heat. May not be good for warmer areas.

GSM stands for grams per square meter, which tells you the weight of the fabric. The weight of the fabric is a good indication of thickness, density, and drape rather than feel. Like thread count with cotton, the softness of the sheet depends less on a high number, and more on fiber quality.

No, a higher GSM is not necessarily better. Much like cotton sheets, the GSM that is good for you depends heavily on what you are looking for in a bed sheet.

Here’s a quick guide to GSM

• Less than 90 GSM: Thin, low-quality sheets that lack durability
• 90-120 GSM: Ideal for microfiber bed sheets. Sheets with this GSM are lightweight and breathable. This is the most common range for microfiber sheets.
• 100-150 GSM: Ideal for lightweight linen sheets. These sheets are airy and breathable, making them ideal for warmer areas.
• 150-200 GSM: Ideal for mid-weight linen fabrics that combine breathability and durability. Also seen in jersey knit cotton.
• 160-165 GSM: Used for medium weight flannel sheets. Durable and substantial, but not too heavy.
• 170+ GSM: Seen most often in heavyweight flannels that are ideal for colder areas.
• 200+ GSM: Seen most often in heavy and dense linen fabrics.

Now that you’ve learned about thread count, shop our selection of Bedding. If you have more questions about how to choose bed sheets, check out our posts on Bed Sheet Fabrics.