Satin and silk are not two kinds of the same thing. Silk is a fiber, produced by silkworms. Satin is a weave structure - a way of floating threads over the surface to make it smooth and glossy - and it can be woven from silk, from polyester, or from other fibers. So a fabric can be silk but not satin (silk chiffon), satin but not silk (polyester satin), or both at once (silk satin, the fabric most people picture when they say either word).
That single distinction answers most buying questions. What follows compares the three fabrics shoppers actually meet - silk satin, polyester satin, and silk in plainer weaves - on sheen, feel, breathability, care and price, so you can tell what a label is really promising.
What Silk Is
Silk is a protein fiber spun by the larvae of the silk moth to form their cocoons, reeled into long filaments and woven or knitted into fabric. It has a natural, soft lustre rather than a hard shine, feels smooth and slightly warm to the touch, breathes well, and drapes in the fluid way that has made it a luxury fabric for thousands of years. It is also delicate: sunlight, perspiration and rough washing damage it, and most silk garments ask for hand washing or dry cleaning. Silk appears in many weaves - satin, chiffon, organza, dupioni, twill - with very different surfaces, which is why "silk" alone never describes how a fabric will look. See the range in the women's silk blouses guide.
What Satin Is
Satin is a weave in which the surface threads float over several threads before binding down, leaving long, uninterrupted lengths of thread on the face. Those floats reflect light evenly - the source of satin's gloss - and make the surface exceptionally smooth, which is why satin is used for eveningwear, bridal gowns, linings and lingerie. Historically satin was silk, and "silk satin" remains the premium version. Most satin sold today, however, is polyester satin: cheaper, more durable and washable, with a brighter, harder shine and less breathability. The weave says nothing about the fiber, so a satin garment's fiber content - printed on its label - is what decides its feel, care and price. Satin garments are surveyed in the women's satin dresses guide.
Side by Side
| Feature | Silk satin | Polyester satin | Silk (plain weaves) |
|---|---|---|---|
| What it is | Silk fiber in a satin weave | Polyester fiber in a satin weave | Silk fiber in weaves like chiffon, twill, dupioni |
| Sheen | Deep, soft gloss | Bright, hard gloss | Gentle lustre to matte, by weave |
| Feel | Smooth, warm, fluid | Smooth, cooler, slightly slick | Varies - crisp, textured or sheer |
| Breathability | Good - natural fiber | Poor to fair - can feel clammy | Good - natural fiber |
| Durability | Delicate; snags and water-spots | Tougher; resists abrasion and washing | Delicate to moderate, by weave |
| Care | Hand wash gently or dry clean | Usually machine washable | Hand wash or dry clean |
| Price | Highest | Lowest | High |
One practical trap: because the floats that make satin glossy are long and exposed, all satins snag more easily than plain weaves, silk or polyester alike - satin is a fabric to keep away from rough jewelry, Velcro and unfiled nails.
How to Choose
- For a special garment worn for years - a wedding dress, an heirloom blouse - silk satin justifies its price in drape, depth of sheen and how it feels against skin.
- For costumes, décor, linings and one-occasion dresses, polyester satin gives most of the look at a small fraction of the cost, and survives the washing machine afterwards.
- For hot weather and all-day wear, silk in a breathable weave beats either satin; gloss is not worth clamminess.
- Whatever you buy, read the fiber label. "Satin" on a product title with no fiber named almost always means polyester; "silk" must legally mean the fiber, and silk blends state their percentages.
Common Questions
- Is satin made of silk?
- Not necessarily. Satin is a weave, not a fiber. Traditional satin was woven from silk, and silk satin still exists, but most satin sold today is polyester. The fiber content on the garment label - not the word satin - tells you what the fabric actually is.
- Which looks shinier, satin or silk?
- Satin, in either fiber, has the stronger gloss, because the weave's long surface floats reflect light evenly. Silk woven plainly has a softer lustre. Silk satin combines both: a deep gloss with the softness of the natural fiber.
- Is silk satin worth the higher price?
- For a garment you will keep and wear on occasions that matter, usually yes - it drapes better, breathes better and ages more gracefully than polyester satin. For costumes, décor or a single wear, polyester satin delivers most of the appearance for far less money.
- How should satin and silk be washed?
- Polyester satin is generally machine washable on a gentle cycle. Silk and silk satin should be hand washed in cool water with a gentle detergent or dry cleaned, kept out of direct sun while drying, and never wrung. Always follow the specific garment's care label first.
Fashion Comparisons: The Full Series
This page is part of the Apparel Search fashion comparisons series, which puts two similar garments, fabrics or materials side by side. Browse the full series below.