How to Wash Silk Pillowcases (Without Ruining Them)

That covers most people. If you sweat at night, your routine has to change, and almost nobody writes about that part. We do, further down.

Can you wash silk pillowcases at all?

Yes. The "dry clean only" label on some silk is manufacturer caution, not physics. Silk has been hand washed for centuries.

What silk cannot handle is heat, alkalinity and mechanical stress. Silk is a protein fiber, chemically closer to hair than to cotton. Hot water relaxes and dulls it. Alkaline detergents and bleach break the protein down. Wringing and high spin speeds stretch the filaments out of shape, and once the weave has been pulled the shine does not come back.

Understand those three enemies and everything below is obvious.

Hand-washing, step by step

This is the method that keeps a pillowcase looking new longest.

Machine washing: how to wash silk pillowcases safely

Machine washing is fine if you control the settings. Silk does not fail because of the machine, it fails because of heat and agitation.

• Put the pillowcase in a mesh laundry bag. This is not optional. It stops the case wrapping around a zip or a bra hook and snagging.
• Use the delicate, hand-wash or silk cycle.
• Cold or cool water only.
• Spin at the lowest speed your machine offers, or turn spin off entirely.
• Silk detergent or a mild pH-neutral liquid. No powder, it dissolves poorly in cold water.
• Wash silk with silk, or at least with other light, soft items. Never with towels, denim or anything with hardware.

Take it out as soon as the cycle ends. Damp silk left crumpled in a drum creates set-in creases.

Can you put a silk pillowcase in the dryer?

No. This is the fastest way to ruin one, and it is usually irreversible.

Dryer heat does three things at once. It shrinks the fabric, because heat plus tumbling contracts the weave. It dulls the surface, because heat damages the smooth protein filaments that create the sheen. And the tumbling itself abrades the fibers, which is why a dried silk case starts to feel slightly fuzzy rather than slippery.

If you are in a hurry, roll the pillowcase in a dry bath towel, press firmly, then hang it near moving air. A silk pillowcase dries in a couple of hours in a normal room. Some people ask about the no-heat or air-fluff setting: the heat problem goes away, but the abrasion does not, so we still say air dry.

If it needs pressing, iron on the lowest setting, on the reverse side, while the fabric is very slightly damp.

How often should you wash a silk pillowcase?

For an average sleeper, once a week.

If you sweat at night, that answer is wrong for you, and this is the gap in nearly every silk care guide online. Sweat is not just water. It carries salts, oils and urea, and when it dries into silk repeatedly without washing, you get two problems: a faint yellow cast along the fold where your face rests, and a slow loss of the smooth hand feel as residue builds up in the weave.

A realistic schedule if you are waking up damp:

• Sweating some nights: wash every three to four nights.
• Sweating most nights: every two nights.
• Sweating heavily, plus night creams or hair oils: daily, and accept that the case will age faster.

That schedule only works if you own more than one. A single silk pillowcase washed every second night spends half its life on a drying rack, which is exactly how people end up back on cotton by Thursday. Two is the minimum for a hot sleeper, three is comfortable. If you are also dealing with hot flashes at night, treat pillowcases like gym socks rather than like heirlooms.

One more honest point. Frequent washing is the right call for your skin and your hair. It is not the right call for the pillowcase. Silk washed daily will not last as long as silk washed weekly, and no care routine changes that.

Mulberry silk: does it need special care?

Not different care, just consistent care. Mulberry silk is the long-filament grade used in good pillowcases, and its quality is measured in momme. Our Soie pillowcase is 22 momme, which is dense enough to take regular washing without going limp. Lighter silk, in the 16 to 19 momme range, is more fragile in the wash and shows wear sooner.

Silk sleep masks are the same fiber in a smaller package, and they need the same treatment. The Lune mask is 16 momme and the Nuit mask is silk on both faces rather than silk on the front and polyester behind, which is worth knowing because the hidden face is the one against your skin all night. Both go in the mesh bag with your pillowcases rather than into a hot wash with your face cloths.

Dense enough to be washed often

Soie, 22-momme mulberry silk

Momme is weight, and weight is what survives a routine. At 22 it takes regular washing without going limp. A 16 to 19 momme case shows wear within a season on the same schedule.

22

momme weight

4

sizes

30°C

maximum, cool cycle

See Soie

Does satin need the same care?

No, and this is a genuine reason to own satin instead.

Polyester satin is a weave, not a fiber. It tolerates warm water, ordinary detergent and a low tumble dry. It does not yellow from sweat the way silk does, and it will not dull if you use the wrong detergent once. It pills eventually, which silk does not, but by then you have washed it fifty times without thinking about it.

If your laundry reality is three washes a week, the Lustre satin pillowcase is the lower-maintenance option. We compared the two properly in silk vs satin pillowcases, including which one suits hot sleepers.

Problems, and what to do about them

A stain will not shift. Treat it as soon as you notice. Dab, never rub, with cool water and a drop of silk detergent, working from the outside of the mark inward. For oil, a tiny amount of mild dish soap on the spot, left for five minutes, then rinsed. Do not use hydrogen peroxide, alcohol, vinegar at full strength or any stain pen containing bleach. All of them lighten silk and the pale patch is permanent.

Yellow marks along the fold. This is sweat and skincare oxidizing in the fabric. Once it has set it is very hard to remove, so the fix is prevention: wash more often. On a fresh yellow cast, a cool soak with silk detergent for five minutes sometimes lifts it. Optical brighteners and oxygen bleach will not save it and will damage the fiber.

A snag or a pulled thread. Do not cut it. Gently work the loop back through to the reverse side with a blunt needle. Snags almost always come from jewelry, rings, zips or nails, which is why the mesh bag matters.

The fabric has gone dull. Usually detergent residue, sometimes heat damage. Rinse it again in cool water with nothing added, twice. If the shine comes back, your rinse cycle was inadequate. If it does not, the surface has been abraded and dullness is permanent.

The cooling feel has gone. Check for residue and softener first. Fabric softener coats the filaments and is the most common culprit. Never use it on silk.

Five mistakes that ruin silk

FAQ

More care answers live on our FAQ page.