Silk vs Satin Pillowcase: Fiber, Feel and Care Compared
Silk vs satin pillowcase: silk is a natural fiber; satin is a weave, today usually polyester. Here is how they differ.
SilkA natural protein fiber
SatinA weave, usually polyesterOn this page
The quick answer: which one fits you
Silk is a fiber; satin is a weave, usually polyester. Neither wins outright: choose by how you'll wash it and the fiber you want.
Choose silk if
- You want a natural fiber
- You'll hand-wash it, or use a delicate cycle and air-dry it
- You sleep warm: Sleep Foundation calls silk typically more breathable
Choose satin if
- You want easy machine care
- You're fine with a synthetic fiber
- You'll read the fiber line to see what it is woven from
Satin vs silk pillowcase: side by side
Eight things that differ, each from the source on its row. Where our sources don't settle one, we say so.
| What you compare | Silk | Satin (usually polyester) | Source |
|---|---|---|---|
| What it is | A natural protein fiber | A weave; the fiber varies | Sleep Foundation |
| Fiber line | Silk; "100% silk" means all silk | Polyester, nylon, acetate or another fiber | FTC |
| Weight measure | Momme, 19 to 25 for pillowcases | Momme is a silk measure | Sleep Foundation, Mulberry Park |
| Feel | Buttery, ultra-smooth | Smooth and soft, with a sheen | Sleep Foundation |
| Breathability | Typically more breathable | Typically less breathable than silk | Sleep Foundation |
| Washing | Cool water, pH-neutral detergent, air-dry | Usually machine-washable | Sleep Foundation, Tide |
| Wear | Strong; snags, harmed by bleach and sun | Not compared in our sources | University of Idaho Extension |
| Hair and skin claims | Skin benefits not proven by rigorous clinical studies; hair claims are brands' | Brand claims only | Sleep Foundation |
How to tell silk from satin on the label
"Satin" names the weave; the fiber line names what the pillowcase is made of. Read that line.
Satin pillowcaseFiber content100% Silk
Satin pillowcaseFiber content100% Polyester
FTC: US rules list fibers by generic name and percentage, and "100% silk" allows no tolerance. Mulberry silk is still listed as silk.
Momme: the weight number on silk
Momme grades silk by weight: about 4.34 grams per square meter for each momme, per Mulberry Park.
A higher momme generally means a denser fabric. Some brands say it also lasts longer; that is their claim.
Washing and care: where they differ most
Silk asks for cool water and gentle handling; polyester satin is usually happy in the machine.
Hard on silk, per the University of Idaho Extension: chlorine bleach, long hours in direct sunlight and rough surfaces that catch the threads.
Silk and satin pillowcase FAQ
Is satin the same as silk?
No. Silk is a fiber and satin is a weave. Satin was first woven from silk and still can be, but most satin pillowcases today are polyester. The fiber line on the label tells you which one you have.
Source: Sleep FoundationIs a silk or a satin pillowcase better for hot sleepers?
Sleep Foundation says silk is typically more breathable than satin made with synthetic materials, and that hot sleepers may therefore prefer it. How warm a pillowcase feels also depends on the rest of the bedding and the room.
Source: Sleep FoundationWhat does momme mean on a silk pillowcase?
It is a weight measure for silk: the weight in pounds of a piece 45 inches by 100 yards, about 4.34 grams per square meter for each momme. Pillowcases commonly sit at 19 to 25 momme, the range Sleep Foundation calls ideal.
Sources: Mulberry Park, Sleep FoundationHow can you tell if a pillowcase is real silk?
Read the fiber content. US textile rules require fibers to be listed by generic name and percentage, and a label that says "100% silk" must be exactly that. A product name with "satin" or "silky" in it says nothing about the fiber.
Source: FTCCan you machine-wash a silk pillowcase?
Follow the care label first. Many silk makers allow a cool delicate cycle in a mesh bag, while others ask for hand-washing only. Polyester satin is usually machine-washable. Our silk washing guide has both sets of steps.
What is mulberry silk?
Silk from silkworms fed on mulberry leaves. Sleep Foundation calls it the most common choice for silk pillowcases.
Do silk or satin pillowcases help hair or skin?
We don't rank either fabric on it. Sleep Foundation says the skin benefits of silk pillowcases are not proven by rigorous clinical studies. Claims about frizz or moisture come from brands and are their claims.
Source: Sleep Foundation
By RestfulPicks
We read what owners report and what textile and sleep sources publish, and name the source of every claim. We don't lab-test fabrics or print scores.