Silk Care & Maintenance

Yes, if the pillowcase is made from quality mulberry silk and your machine has a delicate or silk cycle. The key variables are temperature, spin speed, and what it is washed with. Cold or lukewarm water only (30°C maximum), a delicate cycle with a low spin speed, and a mesh laundry bag to prevent snagging. The reputation silk has for being difficult to wash mostly comes from people using the wrong settings, or from lower-grade silk that was not robust enough to begin with. A well-made 22 or 30 momme pillowcase washed correctly will hold up for years. The ones that do not are usually the ones that were not worth buying in the first place.

Use a pH-neutral detergent specifically formulated for delicates or silk. Silk is a protein fibre and is damaged by alkaline substances, which includes most standard laundry detergents, biological detergents, and anything containing enzymes. Avoid bleach, fabric softener, and any detergent with optical brighteners, all of which degrade the silk filament over time. A small amount of a gentle silk-specific detergent is all that is needed. If in doubt, a capful of baby shampoo in cold water is a reliable emergency substitute. The amount matters too: excess detergent left in the fabric after rinsing causes more damage than the wash itself.

Every one to two weeks is the practical standard, which is roughly the same cadence most people already use for cotton pillowcases. Silk is naturally resistant to bacteria and dust mites, which means it accumulates less than cotton between washes, but it still collects skincare residue, hair product, and general overnight contact. Washing it more than weekly with a machine cycle can shorten its lifespan unnecessarily. If you use a lot of overnight hair or face products, leaning toward weekly is sensible. If your routine is minimal, every two weeks is fine. Rotating between two pillowcases extends the life of both.

Air dry, away from direct sunlight. Never put silk in a tumble dryer — the heat and mechanical action damage the filament and are the single fastest way to shorten a silk pillowcase's lifespan. After washing, gently press excess water out with a clean towel (do not wring or twist), then lay flat or hang to dry in a shaded spot. Silk dries quickly, usually within a couple of hours indoors. If it comes out slightly stiff, that is normal and resolves itself as the fabric softens with use. Putting it on the pillow while just barely damp and letting it dry in place works well and helps it keep its shape.

Yes, but with care. Use the lowest heat setting on your iron (usually marked "silk" or one dot) and always iron on the reverse side while the fabric is still slightly damp. Never iron dry silk on high heat and never use steam directly on it, as concentrated heat and moisture together can leave water marks or damage the surface sheen. A pressing cloth between the iron and the fabric adds an extra layer of protection. In practice, most silk pillowcases do not need ironing at all if they are air dried flat and stored unfolded. The occasions that call for it are mostly when the pillowcase has been left folded and slightly damp for too long.

In order of impact: prolonged sun exposure (UV degrades the protein fibre and causes yellowing), alkaline detergents and bleach, tumble drying, high-heat ironing, and wringing or twisting when wet. Perfume, deodorant, and some skincare ingredients, particularly acids and retinols, can also weaken the fabric over time if they are regularly transferred from skin to pillow. The good news is that all of these are avoidable with straightforward habits. Silk that is washed gently, dried in shade, and kept away from harsh chemicals will outlast most cotton alternatives by a significant margin. The care instructions exist because they work, not because silk is fragile.

Sometimes. If the loss of lustre is from mineral build-up from hard water, a rinse with a small amount of white vinegar diluted in cold water (roughly one tablespoon per litre) can help restore the surface. If it is from sun exposure or repeated washing with the wrong detergent, the damage to the filament is more likely permanent. Prevention is much more effective than restoration. Washing in soft or filtered water, using a silk-specific detergent, and drying away from direct light will preserve the sheen for significantly longer than any recovery treatment can achieve after the fact. If a pillowcase has noticeably dulled within the first few months, it is also worth revisiting whether it was genuine silk to begin with.

A quality mulberry silk pillowcase, properly cared for, should last three to five years with regular weekly or fortnightly use. Higher momme weights last longer because there is more silk fibre per square metre absorbing the wear. A 30 momme pillowcase washed correctly will outlast a 19 momme one by a meaningful margin. The most common reason silk pillowcases fail earlier is not the fabric itself but the washing routine: one or two machine washes at the wrong temperature or with the wrong detergent can age a pillowcase faster than a year of correct care. How long it lasts is almost entirely a function of how it is washed.