The complete guide
How To Choose A Mulberry Silk Sleep Cap
The problem with waking up and starting again
Most people do not think about what happens to their hair while they sleep. You put your head down, you turn over four or five times, and seven hours later you look in the mirror and something has clearly happened. Ends look rougher. A set that looked fine at midnight has gone sideways. Curls that were defined have merged into one shape.
The reason is friction. Hair spends a third of your day being dragged across fabric while you move. Cotton bedding, which most of us use, has a textured surface. It grips. Every turn of the head is a small amount of pull, repeated hundreds of times a night, every night.
A silk sleep cap deals with this by changing what your hair touches. Instead of the pillowcase, it meets a smooth silk surface that moves with it rather than against it. That is the whole idea. It is not complicated, which is probably why it has been around for a very long time.
What makes this cap what it is
This one is cut from 100% mulberry silk at 22 momme, inside and out. Two parts of that sentence matter.
Momme is how silk weight is measured. It is the traditional unit, and it tells you roughly how dense the fabric is. Lightweight silks sit around 12 to 16 momme and feel thin and slippery. Heavier silks, in the 19 to 25 range, feel more substantial and tend to last longer through repeated washing. At 22 momme this sits comfortably in that heavier group, which is why it does not feel flimsy when you pick it up.
The second part is "both sides". A lot of caps on the market are silk on the outside and something else on the inside, or the reverse. Since the inner face is the surface actually touching your hair, a synthetic lining defeats the point. Here both faces are mulberry silk, so what you see is what your hair gets.
The construction is a pleated crown rather than a flat gathered cap. Pleats create volume. That space lets hair sit loosely instead of being pressed down into a shape you then have to undo in the morning. A bow sits at the front, which looks nice and, more practically, tells you which way round to put the thing on when you are half asleep.
The back is elasticated. No drawstring, no ties, no toggles. You pull it on, tuck hair in and that is it.
Who this suits
Curly and coily hair benefits the most, because those textures lose definition fastest when they are rubbed around a pillow. A night in a smooth cap keeps a wash day looking like a wash day for longer. If you are hunting for the best silk bonnet for curly hair, the two things to check are inner material and crown volume, and this cap covers both.
Long hair is the next obvious group. Length means more surface area touching bedding and more chance of tangles forming overnight. Coiling the length loosely on top of the head before putting the cap on works better than letting it hang at the back.
People with fine or short hair sometimes assume a cap is not for them. It still helps, and the elastic means it stays on even with little hair to hold it. Think of it as reducing friction rather than containing bulk.
There is also a travel case. Hotel pillowcases are a lottery. Something that packs flat and weighs almost nothing solves that problem without you having to carry your own pillowcase around.
Working out the fit
The cap is one size, roughly 28 x 23 cm (about 11 x 9 in) laid flat. The elastic does the adjusting.
If you want to be sure before ordering, lay a tape measure across your head from just above one ear, over the crown, to just above the other. Compare that with the flat measurement. The pleated section adds depth beyond what the flat figure suggests, so do not read the numbers as a hard ceiling.
Where it gets tighter is with very tall protective styles. A high bun, a large set of twists or anything with real height may sit above what the crown can hold. In those cases, measure the style itself rather than your head.
The other thing worth saying about fit: the elastic should hold, not pinch. If you find it pressing on the same spot every night, move the band slightly lower at the nape. Small adjustments to position usually fix the problem better than stretching the elastic out, which only shortens its life.
Getting the most out of it
Tuck everything in. Hair left hanging out of the back is the usual reason a cap works loose during the night. Take the extra five seconds.
Put it on dry. Damp hair pushes moisture into the silk, which means a longer dry time and a shorter gap between washes. If you have just washed your hair, let it get most of the way dry first.
Go easy on heavy oils right before bed. They will transfer. That is not a disaster, since the cap is washable, but it does mean laundering it more often than you otherwise would.
Keep a second one if you wear it every night. Rotating two means neither gets washed to death, and you always have one ready.
Washing it without ruining it
Silk is not difficult, it is just specific. Hand wash or machine wash, both are fine here.
For hand washing, use cool water and a small amount of detergent made for delicate fabrics. Swish gently, do not wring, do not scrub. Rinse until the water runs clear.
For machine washing, put the cap inside a mesh laundry bag and use a delicate cycle at a low temperature. The bag stops the bow and the elastic getting caught on anything else in the drum.
Skip bleach entirely. Skip fabric softener too, which coats fibres and gradually dulls the smooth surface you bought the cap for in the first place.
Drying is where most damage happens. Do not tumble dry. Reshape the cap while it is damp, lay it flat and keep it away from radiators and direct sunlight. Both heat and strong sun will fade a dyed silk faster than anything else in your routine.
If it needs pressing, use the lowest iron setting with a cloth between the iron and the fabric. Nine times out of ten, drying it flat means you can skip this altogether.
About the colour
Light plum pink is a soft solid shade with a mauve lean. It is not a hot pink and it is not lilac, it sits between the two. On a bedside table it reads as calm rather than loud.
Worth remembering when buying as a gift: a muted shade like this is far easier to get right than a bold one. You do not need to know anything about the recipient's taste. Since it arrives in a gift box and comes in one size, there is very little that can go wrong.
Screens do vary, so expect a slight difference between the photographs and the cap in your hands. That is true of any dyed fabric, not just this one.
What is not stated
A few details are not given by the maker, and it is better to say so than guess. There is no stated brand, no stated country of origin and no listed item weight or packaged dimensions. No certifications, guarantees or warranties are claimed for this cap.
What is stated is clear enough: 100% mulberry silk at 22 momme on both faces, a pleated crown, a front bow, an elasticated back, one size at about 28 x 23 cm (roughly 11 x 9 in), supplied in a gift box, hand or machine washable.
The short version
Friction is what roughs hair up overnight, and a smooth surface reduces it. This cap gives you mulberry silk on both faces at a weight that feels like something rather than nothing. The pleated crown makes room for hair instead of flattening it, and the elasticated back keeps the whole thing in place without a drawstring to fuss with.
One size covers most adult heads. Cool water, gentle detergent and flat drying will keep it in good shape for a long time. If you have been meaning to try a silk cap and have not got round to it, this is a straightforward place to begin.