Silk and satin pillowcases both promise the same thing: less hair frizz and fewer sleep creases on your face. They are not the same product, though, and the price gap is big. Here is what actually separates them, and which one is worth it for you.
The short version
- Silk is a natural fiber from silkworms. It is breathable, cool in summer and warm in winter, and it holds less moisture than cotton, so it is gentler on hair and skin. It costs more and needs hand washing or a delicate cycle in a mesh bag.
- Satin is a weave, not a fiber. Most satin pillowcases are polyester woven to feel smooth. They give you most of the "slip" benefit at a fraction of the price and go in the regular wash. They are less breathable, so hot sleepers may notice it.
What "momme" means on a silk pillowcase
Momme is the weight of the silk fabric, similar to thread count for cotton. Anything from 19 to 25 momme is the sweet spot for bedding: 19 is lighter and cooler, 22 to 25 is denser and lasts longer. Below 16 momme the fabric feels thin and wears out at the seams. Our mulberry silk pillowcase is 19 momme, which is the standard for a first silk pillowcase.
Hair: which one reduces frizz more?
Both cut friction compared with cotton, which is the main reason you wake up with fewer tangles and less breakage on the pillow side of your head. Silk has the slight edge because it is smoother at the fiber level and absorbs less of the natural oil from your hair. If you sleep in a bonnet anyway, the pillowcase matters less; a silk hair wrap does the same job whichever fabric is under it.
Skin: do they really prevent sleep lines?
Neither fabric is a treatment, but both let your face slide instead of dragging, so the creases you see in the morning are lighter and fade faster. Silk also pulls less moisture out of your skin than cotton, which people with dry or easily irritated skin tend to notice first. If you use overnight skincare, both fabrics absorb less of it than cotton does.
Hot sleepers
This is where the two split. Silk breathes; polyester satin does not, so a satin pillowcase can feel warm by 3 a.m. If you run hot, either choose silk or pick a satin with a cooling finish such as our cooling satin pillowcase set, which is woven to feel smoother and cooler than basic satin.
Care
- Silk: cool water, gentle detergent, no bleach, hang or lay flat to dry, iron on low from the reverse if needed.
- Satin: cold or warm machine wash, low tumble dry. Avoid fabric softener, which builds up on the fibers and dulls the slip.
So which should you buy?
Choose silk if you have dry or sensitive skin, sleep hot, or want one pillowcase that lasts years. Choose satin if you mainly want the hair benefit on a budget, travel a lot, or need a second set for the wash. Many people do both: silk on the bed, satin in the suitcase. Round out the set with a silk sleep mask and a satin hair towel wrap for wet hair after the shower.
Everything above lives in our Sleep & Home Spa collection. Free shipping on orders over $45 to the US, Canada and Australia, and 10% off your first order with code WELCOME10.