How to Wash Cashmere: A Complete Guide

There is a particular quiet at the end of a season. The coats come off their hooks, the knits leave the rotation, and somewhere in the folded pile sits the sweater you reached for most. It has held cold mornings and warm rooms, and it carries the faint memory of both.

That sweater is usually the one people are most afraid to touch. Cashmere carries a reputation for being difficult, and a care label rarely settles the question. If you are wondering how to wash cashmere, the short answer is this: use cool water and a detergent made for fine animal fibers, wash the garment gently by hand without rubbing, twisting, or wringing, then dry it flat away from heat and sun. For anyone who owns or cares for cashmere and wants to keep it soft at home, that simple routine is usually safer than people expect and often kinder to the fiber than a dry cleaner.

At 4 Loving People, we have followed this material from the Mongolian plateau to the drawer it ends up in. What we have learned is that cashmere does not ask for expertise. It asks for cool water, a gentle hand, and the patience to let it dry flat. 

Below, we walk through hand washing, when a machine cycle may be appropriate, what to know about dry cleaning, which detergent to choose, how often to wash, how to dry and care for cashmere between wears, and how to avoid the felting and shrinkage that can permanently change a favorite piece.

Key Takeaways

• Cashmere can be washed at home. Cool water, a gentle detergent, and ten quiet minutes are all it asks for.
• Water does not ruin cashmere. Heat, agitation, and spinning do, by locking the fiber scales together in a matting that cannot be undone.
• Hand washing is gentler than dry cleaning, and most pieces labelled dry clean only will take a careful hand wash without complaint.
• Cashmere is never wrung, never rubbed, and never hung wet. It is pressed between towels, reshaped, and dried flat away from heat and sun.
• Most knitwear needs washing after roughly five wears. Airing a piece between wears replaces most of the washes people think they need.

Why Cashmere Asks for a Gentler Wash

Cashmere is damaged by heat, agitation, and friction, not by water itself.

Hold a fine knit up to the light and the surface looks almost still. Look closer, at the level a microscope reaches, and every strand carries a covering of overlapping surface scales. Those scales are part of what makes an animal fiber warm. They are also what makes it vulnerable.

When heat, moisture, and mechanical movement arrive together, the scales open and lock into one another. Textile researchers call the result felting shrinkage, a matting of the fiber that cannot be undone. A sweater treated this way does not simply become smaller. It becomes a denser, stiffer version of itself, and no amount of stretching brings it back.

Everything that follows comes from this one fact. Water is not the enemy. Hot water, a spin cycle, and a tumble dryer are.

This is also why a piece can survive a decade of gentle washing and die in a single careless one. There is no gradual decline with felting. There is a before and an after, and the after is permanent.

How to Wash Cashmere by Hand

Cashmere is washed in cool water, moved gently, and never wrung or twisted.

Fill a clean sink or basin with lukewarm water, about the temperature of the inside of your wrist. Add a small amount of wool wash; if you do not have one, use a mild soap such as baby shampoo, and avoid regular detergent.

Turn the piece inside out and lower it into the sink until it is fully submerged for gentle hand washing in soapy water. Press it under the surface a few times, then leave it to soak for fifteen to thirty minutes. Do not rub, twist, or knead. The whole method of how to hand wash cashmere is really one instruction, which is to let the water do the work.

Rinse in fresh cool water until it runs clear. Lift the piece out supporting its full weight, because a wet knit is heavy and stretches easily. Gently squeeze, or squeeze out, excess water between your palms, then lay the piece on a dry towel, fold the sweater inside the towel, roll it up, and press again.

Can You Machine Wash Cashmere?

Cashmere can be machine washed only in a mesh washing bag, in a washer set to a cold wool cycle, with the spin turned off.

The honest answer is a qualified yes, and the qualification matters more than the answer. Machines damage cashmere through heat and agitation rather than through water, so a machine offering neither is safe enough.

Read the care label first. If it permits machine washing, place the piece in a mesh washing bag and put it into the washer only on the approved wool or delicate setting. Keep the temperature cold, and reduce the spin to nothing or close to it. Wash it alone, or with other fine knits, and never alongside denim, towels, or anything with a zip.

If the label says hand wash, the label is right. We would rather you spend twenty quiet minutes at a basin than replace something you loved.

Do You Need to Dry Clean Cashmere?

Cashmere rarely needs dry cleaning, and a gentle hand wash is usually the kinder route.

A care label reading dry clean only is often a manufacturer protecting itself rather than protecting the garment. Most knitwear will take a careful hand wash without complaint, and, in most cases, it is better to avoid dry cleaning because repeated solvents can be harsher than washing at home.

There are exceptions worth respecting. A structured coat with a lining, a piece with beading or leather trim, or a stain that has set beyond a damp cloth all belong with dry cleaners. So does anything you would be genuinely unhappy to lose.

Everything else can be washed at home, and the three routes compare simply.

Choosing the Best Detergent for Cashmere

Cashmere needs a pH neutral, enzyme free detergent made for fine animal fibers.

Detergent is the one small choice that does lasting damage. Regular detergent is built for cotton, tends toward the alkaline, and many formulas carry enzymes designed to break down protein. Cashmere is a protein fiber. The two do not belong in the same basin.

The best detergent for cashmere is a gentle, enzyme free wash formulated for wool and fine knits. A tablespoon is plenty. Fabric softener is unnecessary, and it coats the fiber rather than helping it.

Cashmere develops its softness on its own with wear, which is one of the quiet pleasures of owning it. It needs no assistance.

How to Dry Cashmere Without Losing Its Shape

Cashmere should air dry, be laid flat to dry, and never be hung or put in a tumble dryer.

A wet knit holds no opinion about its own shape. It takes the shape of whatever holds it, which is why you should never hang a wet sweater: it will stretch out of its original shape.

Lay the piece flat on a dry towel and reshape it while it is still damp. Ease the body back to its width, straighten the sleeves, square the shoulders. A drying rack is fine too, as long as the piece is fully supported flat. Leave it in moving air, away from radiators, direct sun, and any temptation to tumble dry.

Knowing how to dry cashmere is mostly a matter of waiting. A day is normal. Turn the piece once so both sides breathe, and let it air dry with its drape intact.

Longer, finer fiber recovers from a wash more willingly, which is one reason 4 Loving People spins from it. It is also the quiet argument for buying well once rather than often. Discover our organic cashmere pieces.

How Often Cashmere Needs Washing

Cashmere needs washing less often than many people think, and exactly when you need to wash it is partly personal preference.

Most people wash their knitwear far too often, and washing is where most of the wear happens. The fiber breathes and releases odour easily, so before you wash your cashmere, a piece will usually pass through several outings first.

Five wears is a reasonable rhythm for a sweater worn over a shirt, sooner for something worn against the skin, later for cashmere scarves and outer layers. Some people wash cashmere sweaters twice a season at most, while Derek Guy has said he washes his sweaters every seven to ten wears. Air a piece overnight on a flat surface in fresh air between wears and it stays fresh far longer than instinct suggests.

Spot clean a small mark rather than washing the whole garment. A damp cloth, a little gentle detergent, a light press, then dry flat. The rest of the sweater never needed to be involved.

Cashmere Care Instructions for the Days Between Washes

Cashmere care depends as much on how a piece rests as on how it is washed.

Washing is only one part of the story, and not the part that decides how a sweater looks in five years. Between washes, cashmere garments respond to small habits. Fold it rather than hanging it, give it a day to recover between wears, and lift pills gently with a cashmere comb; a sweater comb works well too, while a sweater stone is better for heavier gauge yarns, and pilling usually eases over time as shorter fibers come out. A lint roller can remove lint and fuzz between washes.

To keep it in pristine condition, always wash it before storing it for the season. Store it clean, folded, and breathing in drawers or breathable cotton bags rather than plastic bins, with cedar balls or lavender sachets to help deter moths and keep dust off. Our guide to how to store cashmere sweaters goes further into the seasonal side of this, and the complete guide to caring for cashmere covers the year as a whole.

It helps to remember what the fiber is. It began as down on the Mongolian plateau, gathered once a year by herding families trained to protect its quality. Something given that carefully is worth a slow kind of care in return.

A Sweater You Keep

Cashmere repays attention in a way few materials do. Wash it kindly and it does not simply survive. It settles, softens, and begins to feel like yours in a way a new piece never quite does.

That is the whole argument for buying a sweater you intend to keep, and it is how we think about every piece at 4 Loving People. The care takes twenty minutes, a few times a season, and it buys years. On the plateau, the fiber in your hands took a winter to grow and a spring morning to gather. Twenty minutes seems a fair exchange.

Explore the collection of cashmere cardigans and knitwear made to be worn, washed, and worn again.

How To Wash Cashmere: FAQs

Can You Wash Cashmere at Home?

Cashmere can be washed at home, and in most cases it should be. A cool hand wash with a gentle, enzyme free detergent is kinder to the fiber than repeated dry cleaning. Support the full weight of the piece while it is wet, and dry it flat rather than on a hanger.

What Temperature Should Cashmere Be Washed At?

Cashmere should be washed in cool water, below 30 degrees Celsius or 86 degrees Fahrenheit. Heat opens the scales along each fiber and encourages them to lock together, which is what turns a soft sweater stiff and small. Cool water, moved gently, avoids the problem altogether.

Does Washing Cashmere Cause Pilling?

Washing does not cause pilling, but washing roughly does. Pills form where loose fibers rub and tangle, so agitation brings them to the surface faster, though pilling usually eases over time as shorter fibers work their way out. Use a Sweater Comb or Cashmere Comb gently on fine knits before they go into the water, while a sweater stone works better on heavier gauge yarns, and keep the wash slow. Longer fiber pills less, as our guide to high quality cashmere explains.

How Do You Dry Cashmere Quickly?

Cashmere dries fastest when you gently squeeze out excess water first, then roll the sweater inside a dry towel. Roll the knit inside a dry towel and press before it goes down to dry. Radiators and hairdryers shrink the fiber and should be avoided entirely; cashmere should air dry flat and never go in a tumble dryer.

Can You Fix a Cashmere Sweater That Has Shrunk?

A shrunken cashmere sweater can sometimes be eased back, though rarely restored in full. Soak it in cool water with a little conditioner, then stretch it gently back toward its shape on a towel and let it dry flat. Felting is permanent, so prevention matters far more than rescue.

How Often Should Cashmere Be Washed?

How often you wash your cashmere is partly a matter of personal preference, and many people do not need to wash it after every wear; as a guide, wash your cashmere after roughly five wears, and less often for scarves, cashmere blankets, and outer layers. The fiber breathes and sheds odour on its own, so a little fresh air between wears or airing a piece overnight usually does more good than water. Spot clean small marks instead of washing the whole garment.