Silk vs Satin Bonnets: Which Is Better for Curls?

Last updated Oct 16, 2026

Silk is better for curls, but satin is an okay budget option. Both are smoother than cotton, so both cut the overnight friction that causes frizz, tangles and broken ends. For bonnets, the difference is in the fiber and construction. Silk is a natural protein fiber that breathes and stays comfortable all night. Most satin is woven from polyester fiber (the same plastic used to make water bottles), which costs less but traps more heat. Both silk and polyester satin fabrics have a smoother and rougher side (though the smoothness difference is subtle for real silk). If a bonnet is going to reduce friction, your hair should be in contact with the smooth side. Since most people also like the outside of their bonnets to be shiny, this usually means a two-layer construction. 

Mulberry silk bonnet next to a polyester satin bonnet, showing silk's softer sheen.

Quick facts

What's the difference between silk and satin?

Silk is a fiber; satin is a weave. Silk comes from silkworm cocoons. Satin describes a way of weaving that leaves one side glossy and smooth. Satin can be woven from silk, but most satin bonnets are polyester, a plastic-based fiber. So "silk vs satin" usually means natural silk vs polyester satin.

That's why labels can be confusing. "silk satin" or "charmeuse" is real silk fibers woven in a satin weave. "Silky," "satin" or "silk-like" on its own almost always means polyester. If the label doesn't say "100% silk," it almost definitely isn't.

Is silk or satin better for curls?

Silk is better for curls, especially for kids. Both fabrics protect curls much better than a cotton pillowcase, which grips each strand of hair and roughs up its outer layer as a child tosses and turns. That roughness is what you see in the morning as frizz, tangles and a flattened curl pattern. Silk and satin both provide a smoother texture that lets hair glide against it instead of rubbing. One area where they differ is comfort and breathability. Silk is a natural protein fiber that lets heat and moisture escape, so the scalp stays comfortable through the night. Polyester satin holds in more heat, and a sweaty scalp means damp roots, more frizz and a child who pulls the bonnet off at 2 a.m. Kids run warm when they sleep, which makes breathability matter more for them than for most adults. A bonnet only works when it stays on, so the fabric they will actually keep wearing is the better choice.

My daughter's curly hair while sleeping on cotton vs after sleeping in a silk bonnet

Which is better for hair, satin or mulberry silk?

Mulberry silk. It's the smoothest, most uniform kind of silk, which makes it the gentlest on hair. Polyester satin is a reasonable stand-in if budget is tight, but it doesn't breathe like silk and wears out faster.

What's the difference between 100% silk and mulberry silk?

All mulberry silk is silk, but not all silk is mulberry. "Mulberry" names the silkworm (Bombyx mori) that's raised on a diet of white mulberry leaves. Its cocoons produce long, even filaments, which weave into a smoother, stronger fabric. Wild silks such as tussah have shorter, coarser fibers. A label that says only "100% silk" is real silk, but it may not be mulberry.

What do 6A and momme mean?

Two numbers tell you most of what you need to know about silk quality:

• Grade (A, B, C, with 6A the highest): how long and even the raw silk fibers are. Longer fibers mean a smoother surface and fewer weak spots. 6A is the top grade, with the longest and most even fibers.
• Momme (mm): the fabric's weight, like thread count for cotton. Most silk sleepwear falls between 16 and 25 momme. Higher numbers are denser and more durable; 19 momme is a common balance of softness and strength.

Sleepy Strands bonnets are two layers of 6A, 19-momme mulberry silk.

Care label on a Sleepy Strands bonnet shows 100% silk

How can you tell if a bonnet is real mulberry silk?

Start with the label and the price, then check the fabric itself. No single test is perfect, so look for several signs together:

1. Read the label. Real silk says "100% silk" or "100% mulberry silk," often with a momme weight. "Silky," "satin" or no fiber content at all are red flags.
2. Check the price. A genuine mulberry silk bonnet rarely costs less than about $25, even on sale. A $9 "silk" bonnet is almost certainly polyester.
3. Look at the shine. Silk has a soft, pearly shimmer that shifts with the light. Polyester satin has a glossy, mirror-like shine.
4. Feel it warm up. Rub the fabric between your fingers for a few seconds. Silk warms to your touch; polyester stays cool and slippery.
5. Try the burn test (adults only). Snip a small scrap from an inside seam and hold it to a flame over a sink. Silk burns slowly, smells like burnt hair and leaves a soft ash that crumbles. Polyester melts into a hard bead and smells like plastic.

Comparing the sheen of mulberry silk and polyester satin fabric

Is it better to sleep with a silk pillowcase or a silk bonnet?

A bonnet protects more, because it goes wherever your child's head goes. A pillowcase only helps while their hair is on the pillow, and a lot of kids end up sideways, on the mattress or on a stuffed animal by morning (at least my daughter does!). A bonnet also keeps curls gathered, so there's less room to get crushed or tangled against each other.

A silk pillowcase is still a good backup. If the bonnet slips off in the night, the hair lands on silk instead of cotton. For kids with longer curls or braids, using both gives the most protection.

Can you sleep with your hair down on a silk pillowcase?

Yes, and it's much better than sleeping with hair down on cotton. Loose curls will still flatten and tangle more than they would inside a bonnet, though, because the're much more wiggle room to spread out, twist, and rub against each other. For defined curls in the morning, a bonnet, or a loose pineapple ponytail on a silk pillowcase, will give better results than hair fully down.

When is satin good enough?

Satin is an okay choice in a few situations:

• You're testing whether your child will wear a bonnet at all. A cheap satin one is a low-risk trial.But note that trapped heat or irritating synthetic fabrics may mean they pull it off for other reasons.
• It's a spare for sleepovers, camp or the car, where it might get lost.
• Your child sleeps cool and hasn't complained about sweaty hair.

Any bonnet beats no bonnet. If satin is what fits your budget right now, it will still protect your child's curls far better than cotton.

How to choose the right silk bonnet for your child

Look for four things:

1. 100% mulberry silk, ideally 6A grade and 19 momme or higher.
2. A size made for their head. Adult bonnets slip over a child's eyes or off the back of the head overnight. Kids' sizes should go by age or head circumference.
3. A secure, comfortable band or ties that stays on without leaving marks on the forehead, and won't fall loosely around your child's neck while they sleep.
4. Easy care you'll actually keep up with, like being able to toss it in a laundry bag and washing machine.

We designed the Sleepy Strands mulberry silk bonnet around those four points: two layers of 6A, 19-momme mulberry silk, a loop to secure long ties, and three sizes from 18 months to 18 years. The Large also fits many adults with smaller heads. If you're not sure which size to pick, our size chart gives recommendations by age and head circumference.

Child wearing a Sleepy Strands mulberry silk bonnet (size M, Ebony)

Shop the mulberry silk bonnet →

Frequently asked questions

Does satin cause frizz?

No. Satin reduces frizz compared with cotton because it provides a smoother surface for hair to lie on. It can contribute to frizz indirectly if it makes your child's scalp sweaty, since damp roots puff up as they dry.

What age can a child wear a silk bonnet?

Our bonnets are made for children 18 months and older. For younger babies, the safest sleep space has nothing on or around the head. Our guide to bonnet safety by age covers this in detail.

Is silk worth it if my child has straight or wavy hair?

Yes! Especially if their hair tangles overnight. Silk reduces friction on any hair type, not just curly and coily. The benefit is just especially visible on curls, coils and braids, because they're prone to tangling and frizzing.

How long does a silk bonnet last?

With gentle care, a good mulberry silk bonnet lasts for years, or until your child grows out of it. Wash it by hand or on a delicate cycle in cool water, and leave it out to dry.

Can I put a silk bonnet in the washing machine?

You can, on a delicate cycle or in a mesh laundry bag, with cool water (a gentle detergent, like those recommended for baby clothes wouldn't hurt either!). Skip fabric softener and the dryer, both of which can dull silk's surface over time.

Related guides

• Are Silk Bonnets Safe for Kids? A Guide by Age
• Why Does My Daughter's Hair Feel Like Straw?
• Kids' Bonnet Size Chart