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Choosing a Silk Pillowcase Set of 2, A Plain-English Buyer's Guide
The problem with a cotton pillowcase
Most people never think about the surface their face spends a third of its life on. Then one morning you catch sight of the crease running up your cheek, or you spend five minutes untangling the back of your hair, and the thought arrives: the pillowcase is doing this.
Cotton is a short-staple fibre. Spin it into yarn, weave it, and you get a surface with real texture. Run your fingertip across a percale case and you can feel the grid. That grid is pleasant underhand and useful for breathability, but it is also a thousand tiny points of friction. When you roll over at three in the morning, your hair and your skin do not glide across it. They catch, pull slightly, release, and catch again.
Silk works differently. A silk filament is one long, continuous strand, often hundreds of metres from a single cocoon. Woven, it makes a surface much closer to a flat plane than a grid. The practical result is that things slide. Hair slides. Your cheek slides. There is nothing mystical about it, just a smoother surface with less to grab onto.
What momme actually tells you
If you shop for silk bedding for more than about five minutes you will run into momme. It is pronounced "moe-mee" and it is a weight measure, specific to silk, that counts how many pounds a fixed length and width of the fabric weighs. The higher the number, the more silk there is in the cloth.
This pair is 19 momme, and that number sits in a useful spot. Below about 16 momme, silk gets thin. It still feels lovely, but it is more see-through, it snags more easily, and it does not last as long under weekly washing. Above 22 momme, you get into heavy, almost upholstered territory. The fabric is beautiful and it will outlive you, but it costs considerably more and some people find it feels stiff rather than fluid on a pillow.
Nineteen momme is the middle ground most regular silk sleepers end up at. It drapes properly over a pillow, it has enough weight that it does not slide off the bed in the night, and it stands up to being washed every week or two. If you are looking for the best 19 momme silk pillowcase for everyday use rather than for a guest room that gets used twice a year, that weight is a sensible place to land.
Both sides, not just the top
Here is a detail worth checking on any silk pillowcase before you buy. Plenty of cases on the market are silk on one face and cotton or polyester on the other. It cuts the cost significantly, and from a photograph you cannot tell.
The problem shows up at two in the morning. You flip the pillow over because the top side has gone warm, and now your face is on cotton. You have paid for silk and you are sleeping on a blend half the time. Some people genuinely do not mind, but if the whole point of the purchase was the smooth surface, a single-sided case undercuts it.
These are mulberry silk front and back. Either face is the same. You can flip the pillow as often as you like and nothing changes.
Getting the size right
This is where most silk pillowcase returns come from, and it is entirely avoidable.
The size here is listed as standard, and the maker does not give the measurement in centimetres. The word standard is slippery because it means different things depending on where the pillow was made. A standard Irish or British pillow runs roughly 50 x 75 cm (20 x 30 in). Continental pillows are 50 x 70 cm, or square at 65 x 65 cm. North American queen and king pillows are longer again.
So do this before you order. Take a pillowcase that currently fits your pillow well, lay it flat on the bed, smooth it out, and measure it corner to corner with a tape. Write the numbers down. If they land near 50 x 75 cm you are in standard territory and a standard case should work. If your pillows are square or continental, a rectangular standard case will not sit right no matter how good the silk is.
Silk does have a small amount of give, so a case that is a centimetre or two snug will usually stretch onto the pillow without complaint. A case that is five centimetres short will not.
The hidden zip, and why it matters more than you'd think
Pillowcases close in one of three ways. An open end, which is the cheapest and lets the pillow wander out. An envelope flap, where a folded panel tucks the pillow in. Or a zip.
These use a hidden zip, sewn into the side seam so it does not show from the front. Two things come from that. The pillow stays fully enclosed all night, which matters more with silk because the fabric is slippery and a loose pillow will work its way out of an envelope closure by morning. And the face of the case stays unbroken, which suits a plain solid colour like sage green, where any fastening on the front would be the only thing your eye landed on.
The zip sits along the edge, well away from where your head rests. In practice you forget it is there.
Living with sage green
Sage is a quiet colour. It is green with grey in it, closer to a dried herb than to grass or emerald, and it behaves almost like a neutral in a bedroom. It sits comfortably against white cotton, cream, warm grey, oatmeal and natural linen. It works with wooden furniture and with painted furniture. It does not fight a patterned duvet the way a saturated colour would.
If your bedding is mostly white and you want a small amount of colour without committing to a whole new duvet set, a pair of sage green pillowcases is about the lowest-risk way to do it. And because there are two in the pack, both sides of the bed match, which looks considerably more deliberate than a single coloured case next to a white one.
Washing silk without the drama
The care here is hand wash only, and people see that and assume it is going to be a weekly ordeal. It takes about four minutes.
Fill a basin or a clean sink with cool water. Add a small capful of a mild detergent made for delicates. Put the case in, swirl it gently with your hands for two or three minutes, and leave it to sit for another five if it needs it. Rinse in clean cool water until there is no soap left. Then lift it out, lay it on a dry towel, roll the towel up and press. Do not wring or twist, which is what breaks silk fibres.
Dry it flat on a fresh towel or hang it somewhere shaded with air moving. It dries faster than cotton. Keep it out of direct sun, because sunlight is the main thing that fades dyed silk, and keep it off radiators.
Skip the fabric softener entirely. Softener coats fibres, and coating a silk fibre takes away the exact slip you paid for. Bleach and enzyme detergents are also out, as both attack protein fibres like silk and wool.
If you want to iron, use the lowest silk setting, work on the reverse side, and do it while the fabric is slightly damp. Most people find they do not bother, since the creases hang out once the case is back on the pillow.
Having two cases in the set is the practical answer to hand washing. One is on the bed while the other dries, and the rotation handles itself.
The short version
This is a pair of standard-size pillowcases in 100% mulberry silk, 19 momme, solid sage green, with a hidden zip. Both faces are silk, so flipping the pillow changes nothing. The weight is a sensible everyday one, heavy enough to last through weekly washing and light enough to drape properly.
Measure your pillow before you order, because the case measurements in centimetres are not stated and standard varies by country. Hand wash in cool water, dry flat out of the sun, and skip the softener. Do that and a silk pillowcase set of 2 will still look right years after a cotton one would have gone grey and pilled.