The complete guide
The Honest Buyer's Guide to Mulberry Silk Pillowcases
The problem with a perfectly good cotton pillowcase
Cotton bedding is comfortable. Nobody is arguing otherwise. But cotton has a texture, and that texture does two things you only notice when you stop and think about it.
The first is friction. Every time you turn over, your hair and your cheek drag across thousands of tiny woven loops. Over seven or eight hours that adds up. It is why long hair can look like it has been through a hedge by morning and why some people wake with a crease down one side of their face that takes an hour to fade.
The second is heat. Cotton absorbs moisture and holds it. On a humid Auckland night or anywhere the bedroom does not cool down properly, that means a pillow that goes warm and slightly damp within twenty minutes, which is exactly why you keep flipping it looking for the cold side.
A silk pillowcase does not fix your sleep. Nothing you put on a bed does that by itself. What it does is take away two small irritations that quietly make the night worse.
How silk actually works
Silk is a protein filament, not a plant fibre. A silkworm produces it as one continuous strand, and when that strand is long, even and unbroken, you get a very smooth surface with almost nothing for hair to catch on. That is what Grade 6A means on this pillowcase. It is the grading used for the longest, most consistent filaments.
The number that matters most, though, is momme. Momme is a weight measure, and it tells you how dense the fabric is. Lightweight silk around 16 momme feels lovely in the hand but wears thin faster. Heavier silk at 22 momme and above is very durable but costs considerably more and can feel a little stiff at first. This pillowcase sits at 19 momme, which is the weight most people settle on. It has enough substance to drape properly and survive regular washing, while still moving across the pillow like water.
The 600 thread count describes how tightly the weave is packed. With cotton, thread count is the headline number. With silk it is secondary to momme, but a tight weave does contribute to that smooth, almost cool-to-the-touch surface.
Then there is breathability. Silk moves heat and moisture rather than soaking it up and holding it. You feel this as a pillow that stays cool longer. It is not refrigeration. It is simply a fabric that is not working against you.
Why both sides matter
Here is something worth checking on any silk pillowcase you look at, including this one.
A lot of pillowcases sold as silk have silk on one face and cotton, polyester or a satin blend on the other. The maker saves money, and the listing is not technically lying. But you notice it the moment you flip the pillow at two in the morning and land on the wrong side.
This one is double-sided mulberry silk. Both faces are the same fabric, so it does not matter which way the pillow goes in or which way it ends up at three in the morning. For a 19 momme silk pillowcase this is the detail that separates a good one from a cheap one.
Who it suits
People with long, curly, fine or chemically treated hair tend to feel the difference fastest. Less drag overnight means fewer tangles to work through in the morning. That is the single most common reason people go looking for the best silk pillowcase NZ shoppers can get hold of.
Hot sleepers are the other big group. If you flip the pillow more than twice a night, a breathable pillowcase is worth trying before you spend money on a new mattress or a fan.
It also suits anyone who uses night creams or facial oils, simply because a smooth surface does not scuff at the skin the way a textured weave can. And it suits people buying a gift. White is universal, queen is the common size, and silk reads as generous without being too personal.
Who it suits less: anyone who will not hand wash. This pillowcase is hand wash only. If that sounds like a chore you will resent in six weeks, be honest with yourself now.
How to choose between options
Check the momme. If a listing does not state it, that is a flag. Anything under 16 momme is thin. The 19 to 22 momme range is the sweet spot for everyday use.
Check both sides. Look for the words double-sided or 100 percent silk on both faces. If a listing only mentions a silk front, assume the back is something else.
Check the closure. A hidden zip keeps the pillow enclosed and nothing presses into your face. Envelope flaps are cheaper to make but let the pillow slide out. Buttons look nice in photos and are irritating to sleep on.
Check the size in centimetres. Imperial labels vary by country. This one is 75 cm by 50 cm, which is standard queen here. Measure your own pillow if it is a deep or contoured foam shape.
Check the colour realistically. White shows marks from hair oils and makeup more than a darker shade, but it is easy to match and easy to keep looking fresh with regular gentle washing.
Looking after it
Silk is not fragile, but it does not forgive heat and harsh chemicals.
Hand wash in cool water with a detergent made for delicates. Swirl it gently rather than scrubbing, and give it a few minutes at most. Do not bleach, and do not leave it soaking.
To dry, lay it flat on a clean towel and press the water out. Never wring it. Then dry flat or hang it in the shade with good airflow. Direct sun and tumble dryers are the two things that will dull a pure silk pillowcase faster than anything else.
Creases usually fall out once the case is back on the pillow. If you want it crisp, iron on the coolest setting, on the reverse, while it is slightly damp.
Wash it every one to two weeks, more often if you use rich creams or leave-in hair products. A second pillowcase makes this much easier, because you always have one ready while the other dries.
What to expect in the first week
The first night usually feels noticeably cooler and a bit slippery, in a good way. Some people find their pillow slides around on the sheet more than they are used to, since silk on cotton has less grip. That settles once you adjust.
By the end of the first week you will know. Either you have stopped flipping the pillow and your hair is behaving better, or you have not noticed much at all. Both are fair outcomes. Silk is a comfort upgrade, not a miracle, and anyone telling you otherwise is selling harder than we are.
Delivery and returns in plain terms
Orders go out by tracked courier from Australian warehouses, and most arrive in 5 to 10 working days. Delivery is free NZ-wide on orders over NZ$175.
Returns are open for 14 days from delivery, provided the pillowcase is unused and unwashed in its original packaging. That is why we suggest checking the fit against your pillow before the first wash.
The short version
This is a single queen pillowcase, 75 cm by 50 cm, in plain white 19 momme mulberry silk with silk on both faces, a 600 thread count weave and a hidden zip. It weighs almost nothing, it feels cool when you lie down, and it is smooth enough that hair and skin slide over it rather than catching.
It needs hand washing and it needs to stay out of the sun. If you are fine with that, it is a small change that most people notice on the first night and keep noticing for years.