The complete guide
The Buyer's Guide to 30 Momme Silk Pillowcases
The problem with the pillowcase you already own
Most people never think about their pillowcase. It comes with the sheet set, it goes on the pillow, and it gets replaced when it wears thin. That is fine, right up until you notice the small irritations. Cotton grips. Hair tangles against it overnight. The weave presses lines into your cheek that take an hour to fade. On a warm night the fabric holds heat right where your head sits.
None of that is dramatic. It is just a bit of friction between you and a good night's sleep, repeated every single night.
A silk pillowcase changes the surface. Silk filaments are long and smooth, and the charmeuse weave lays them flat. Your skin and hair move across the fabric instead of catching on it. That is a property of the material, not a trick, and it is the main reason silk has been used for bedding for a very long time.
What momme actually measures
If you shop for silk for more than five minutes you will run into the word momme. It is pronounced "moe-mee" and it is the traditional Japanese unit for the weight of silk fabric. In practice it tells you how much silk is in a given area. The higher the number, the denser the cloth.
Silk bedding usually lands somewhere between 16 and 30 momme. Anything in the high teens is light. The low twenties is the common middle ground. Thirty momme is at the top end of what is made for pillowcases, and you can feel the difference the moment you pick it up.
Heavier silk does a few useful things. It drapes rather than floats, so it stays put on the bed instead of slipping off the pillow. It feels cool without feeling flimsy. And because there is more fibre in the weave, it stands up to repeated washing better than a very light silk does. That last point matters more than people expect, since a pillowcase is one of the most frequently laundered items in the house.
This one is 30 momme, with a 300 thread count, woven from 100% mulberry silk. Silk runs on both faces of the pillowcase, so there is no cotton backing hiding on the underside.
Why undyed natural white is its own thing
Most white bedding is not really white. It has been brightened, usually with optical brighteners that reflect light to make the fabric read as crisp and cool. It looks sharp, and there is nothing wrong with it.
Undyed silk is different. The colour you see is the natural tone of the fibre, with nothing added. It sits a touch warmer and softer than a bleached white, closer to the colour of cream in low light. Some people seek this out because they want bedding without added dye. Others simply prefer the way the softer white looks against linen, stone or oatmeal tones.
Worth knowing before you order: if you put it next to a freshly bleached white sheet, you will see the difference. It is not a flaw. It is what undyed looks like. If your bedding is a very bright optical white and that contrast would bother you, this is a detail to weigh up.
The closure, and why it matters more than you think
The opening on a pillowcase is the part most people ignore and then quietly resent. Zips press into your face. Buttons leave marks. A plain open end lets the pillow creep out over the course of the night.
This one uses an envelope closure with a side entry set slightly off centre. The pillow slides in, the extra fabric folds back over the opening, and the pillow stays tucked. There is no hardware anywhere near your head.
The offset placement does one more thing. Because the opening does not run along the visible edge, the finished pillowcase has a clean face when it is sitting up against the headboard. That means it works as a sham during the day and a pillowcase at night, without you needing to buy two separate things. It is a small design decision that earns its keep.
Who this suits
People with long hair tend to notice silk first. Hair slides across the smooth face rather than dragging, which is why a silk pillowcase is a regular recommendation in haircare routines. Again, that is about friction and surface, not about any treatment in the fabric.
Warm sleepers often get on with silk too. It feels cool when you first lie down and it does not hold heat the way a thick brushed cotton can.
It also suits anyone building a bedroom that looks finished. A heavyweight silk pillowcase in natural white reads as deliberate in a way that a thin shiny one does not. The weight is visible in how it sits.
Where it suits less: a household that wants to throw everything in a hot wash with the towels. Silk needs a gentler routine. Not a complicated one, but a gentler one.
How to choose the right size
This pillowcase is a standard size, 71.1 cm long by 50.8 cm wide, and it ships as a single. Standard is the most common pillow dimension in Australian homes, so it suits the pillows most people already own.
The mistake to avoid is guessing. Pillows get called standard, queen and king, and the names do not always match what is actually in the cupboard. Pull your pillow out, lay it flat, and measure it across its widest point. If it comes in close to 71 by 51 cm, standard is your size. If it is noticeably longer, you have a queen or king pillow and a standard case will not sit right.
One more thing to check is loft. A very overstuffed standard pillow will fill the case tightly and leave the envelope flap sitting short. If your pillow is deep and firm, factor that in.
Looking after it
Silk is less fragile than its reputation suggests, and a 30 momme weave is sturdier than most. The routine is simple.
Wash it in cool water, either by hand or on a gentle machine cycle. If you are using the machine, put the pillowcase in a mesh laundry bag so it cannot snag on the drum or on a zip from something else in the load. Use a mild detergent made for delicates. Skip the fabric softener, since it coats the fibre and dulls the sheen that you paid for.
Never bleach it. Do not soak it for long periods. If something spills, blot it with cool water and a drop of gentle detergent rather than scrubbing at it.
For drying, lay the pillowcase flat or hang it somewhere shaded with good air movement. Direct sun and tumble dryers are the two things that age silk fastest. It dries quickly on its own.
If it needs pressing, use the lowest heat, work on the reverse side, and go over it while it is still slightly damp. Most of the time a silk this heavy drops its creases without any help once it is on the pillow.
Dry cleaning is also fine if you would rather hand it over to someone else.
A practical tip: buy two and rotate them. It halves the washing pressure on each one and means you always have a clean case ready.
The short version
This is a single standard-size pillowcase, 71.1 by 50.8 cm, made from 100% mulberry silk at 30 momme with a 300 thread count. The silk runs on both faces. The colour is natural white and undyed, which gives a softer, warmer white than bleached sheeting. The closure is an offset side-entry envelope, so there is no hardware near your face and the case doubles as a sham.
Thirty momme is heavyweight. That means a fabric with body, a smooth cool surface, and enough substance to handle regular washing. If you have tried a thin silk pillowcase before and found it underwhelming, the weight is the thing that is different here.
Measure your pillow before you order, wash it gently, dry it out of the sun, and it will look after you for a long time.