The complete guide
How to Choose a Long Silk Bonnet for Long, Thick or Curly Hair
The problem with ordinary bonnets
Most sleep caps are made for the average head of hair, and average means somewhere around shoulder length. If your hair is longer than that, or thicker, or curly, or in braids, you have probably had the same night. You tuck everything in. The cap feels fine for ten minutes. Then you turn over and half of it has worked its way out, and by morning the cap is on the pillow and your hair is doing whatever it wants.
The issue is not usually the fabric. It is the shape. A short round bonnet has nowhere for length to go, so the hair gets folded back on itself and pushed against the scalp. That creates pressure, which creates movement, which eventually pops the cap off. Adding a tighter elastic does not fix it, it just gives you a line across your forehead.
A long bonnet solves the geometry instead. An 80 cm (31.5 in) body gives the hair a channel to lie in, so nothing is compressed and nothing is fighting the cap. That is the whole idea behind this one.
What 22 momme actually tells you
Silk is sold by momme, written mm in some listings, which is a weight measurement. Higher momme means more silk per square metre, which means a denser fabric with more drape.
You will see silk sleepwear and bedding sold anywhere from about 16 momme up to 30. Sixteen is light and fluid, pleasant but thin. Twenty-five and above gets expensive quickly. Twenty-two sits in the middle in a way most people find satisfying. Hold it and it falls rather than floats. It has enough body that it does not feel like a scarf, and enough softness that it does not feel stiff.
That weight matters for a bonnet in a specific way. A heavier silk is less likely to lift off as you move, because it has a bit of mass to settle with. A very light cap wants to migrate. This is one of the practical reasons people hunting for the best 22 momme silk bonnet land on that number rather than going lighter to save money.
Why silk and not cotton
Cotton is a short staple fibre spun into yarn and then woven, and however fine the weave, the surface has texture. You cannot see it, but your hair feels it. Every time you turn your head, strands catch on that texture and get dragged.
Silk is different. It is a long continuous filament, and woven up it gives a smooth, even surface. Hair slides across it rather than snagging. This is the same reason silk pillowcases caught on, except a bonnet travels with you and protects the hair all the way round rather than only where it touches the pillow.
It is worth being clear about what that does and does not mean. Silk is smoother than cotton. That is a property of the fibre, and it is measurable. Anything beyond that, about what it does to hair or skin over time, varies enormously from person to person, and we are not going to make promises on that front.
Who this cut suits
The long shape is specifically for people whose hair does not fit a normal cap.
If your hair is past the shoulder blades, you will immediately see the point. The same is true for thick hair of any length, because volume takes up as much room as length does. Curly hair benefits for a slightly different reason, which is that curls need space to keep their shape. Squashing them into a tight round cap flattens them on one side.
Protective styles are another good fit. Braids, twists and plaits are bulky and they have a length that does not compress. A long bonnet lets them hang inside rather than coil up. Anyone searching for the best silk sleep bonnet for braids is really looking for room, and that is what the 80 cm body provides.
Locs work too, within reason. If your locs are longer than 80 cm you will need to fold them once, which is still gentler treatment than letting them move freely against bedding all night.
How to work out your size
This is simpler than it sounds. Let your hair down, take a soft tape measure, and measure from the crown of your head to the ends. That number is what has to fit inside the cap.
If it comes in under 80 cm, you have room to spare, which is what you want. If it is right at 80 cm, it will still work, you will just be filling the cap rather than having slack. Over that, you fold.
Head circumference is the other half of the equation, and the maker does not state a specific measurement for the opening. The pull-on design relies on the cut and the give of the fabric, which is how most bonnets in this style are built.
Putting it on
There is no technique to learn. Gather the hair at the back or the top, whichever you prefer, open the cap with both hands and slide it over. The long section takes the length.
Some people prefer to loosely plait first, which keeps the hair in one bundle and makes it easier to feed into the cap. Others go in loose. Neither is wrong. If you use leave-in products or oils at night, a loose plait keeps the product concentrated on the hair rather than spread across the inside of the bonnet, which also means fewer washes.
A quick note on tightness. A bonnet should sit, not grip. If you find yourself pulling it down hard to keep it on, something about the fit is off, and forcing it is not the answer.
Looking after it
Silk is not fragile exactly, but it does not like three things: heat, bleach and rough handling. Avoid those and a silk cap lasts a long time.
Care here is hand wash or dry clean. For hand washing, fill a basin with cool water, add a small amount of detergent made for delicate fibres, and let the cap sit for a few minutes. Swirl it gently. Do not rub it against itself and do not wring it out. Rinse in clean cool water until there is no more soap.
To dry, lay it flat on a clean towel, roll the towel up and press to absorb the water, then unroll and let the cap dry flat. Keep it away from radiators and out of direct sunlight, because both will dull the fibre over time. Skip the tumble dryer entirely.
If it comes out creased, a cool iron on the inside of the fabric will sort it, or a steamer held a little distance away. Most of the time the creases drop out on their own as the silk hangs.
How often to wash depends on you. Every week or two is normal. If you use oils or heavy creams at night, make it more frequent, because build-up is what eventually makes any cap feel limp.
On colour
This one is a solid dusty pink, which is a muted warm pink rather than a bright one. It reads as a soft neutral in most bedrooms and does not fight with patterned bedding the way a strong colour can.
Practically speaking, a mid-tone colour also hides the ordinary marks of use better than either pure white or very dark shades, which show oils and lint respectively. If you are buying a pink silk bonnet as a present and you do not know the recipient's taste well, a dusty tone is the safer choice.
Travel and storage
A silk cap weighs almost nothing and folds down to the size of a small handkerchief. It goes in a handbag, a carry-on side pocket, a hotel drawer. There is no structure to crush and nothing to break.
At home, keep it somewhere it is not getting squashed under heavy things. A drawer or a small cloth bag is plenty. Silk does not need special storage, it just needs to be dry and out of strong light.
The short version
If your hair is long, thick, curly or in a protective style, a standard round bonnet was never going to hold it. The length is the point. This one is 80 cm (31.5 in), made from 100% mulberry silk at 22 momme, with a pull-on fit and no ties to deal with. It is dusty pink, it hand washes, and it packs flat.
Measure your hair from the crown down. If that number fits inside 80 cm, this cap will do the job without a fight.