How Do You Wash and Clean a Cashmere Sweater Properly?
To wash a cashmere sweater, turn it inside out and submerge it in cold water with a small amount of mild detergent. Gently squeeze the soapy water through the fabric without wringing or scrubbing. Rinse thoroughly in cold water, press out excess water using a clean towel, then reshape and dry flat away from direct heat or sunlight.
Cashmere is one of the most prized natural fibers in the world, and proper care is what separates a sweater that lasts a decade from one that pills and shrinks after a single wash. The good news is that learning how to wash and clean a cashmere sweater at home is not complicated. With the right technique, a gentle detergent, and a little patience, you can keep your cashmere looking and feeling luxurious for years. This guide covers everything from hand washing step by step to stain removal, drying, storage, and the most common mistakes people make with delicate fabric care.
Why Cashmere Requires Special Care
Cashmere comes from the fine undercoat of cashmere goats, primarily from regions in Mongolia, China, and parts of Central Asia. The individual wool fibers are extraordinarily soft and thin, which is what gives the fabric its signature warmth and texture. However, those same fine fibers are also highly susceptible to heat, agitation, and harsh chemicals.
When cashmere is exposed to hot water or mechanical stress, the protein structure of the wool fibers causes them to contract and lock together. This is what leads to shrinkage and that stiff, felted texture that ruins a sweater permanently. Preventing shrinkage starts with understanding that cold water, minimal agitation, and gentle detergent are not optional, they are essential.
Unlike synthetic fabrics or even cotton, cashmere cannot be tossed into a standard wash cycle and expected to survive. That said, caring for it is not difficult once you know the rules. A consistent natural fiber care routine will protect your investment and maintain the drape, softness, and shape that make cashmere worth wearing.
How to Hand Wash a Cashmere Sweater: Step by Step
Hand washing is the safest and most recommended method for cleaning cashmere at home. Follow these steps carefully to get a thorough clean without damaging the fabric.
What You Will Need
Before you begin, gather a clean basin or sink, cold or lukewarm water (never hot), a mild detergent specifically formulated for delicate fabrics or wool, a clean dry towel, and a flat drying surface. Baby shampoo or a fragrance-free wool wash both work well as the best detergent for cashmere if you do not have a dedicated cashmere wash on hand.
Step One: Check the Care Label
Always read the care label before washing any garment. While most cashmere items are hand wash only, some blends or treated cashmere may have slightly different instructions. If the label says dry clean only, follow that guidance, particularly for structured or embellished pieces.
Step Two: Turn the Sweater Inside Out
Turn your cashmere sweater inside out before it touches water. This reduces friction on the outer surface during washing and helps prevent pilling on the more visible side of the fabric.
Step Three: Prepare the Wash Basin
Fill a clean sink or basin with cold to lukewarm water. The temperature should feel comfortable to the touch but never warm. Add a small amount of mild detergent, roughly one teaspoon, and swirl the water gently to distribute it. Avoid creating excessive bubbles or foam.
Step Four: Submerge and Soak
Place the sweater into the water and gently press it down until it is fully submerged. Allow it to soak for 20 to 30 minutes. This soaking period does most of the cleaning work by loosening dirt, oils, and odor from the fibers without requiring you to scrub or agitate the fabric.
Step Five: Gently Work the Fabric
After soaking, use your hands to very gently squeeze the soapy water through the sweater. Focus on areas like the underarms, collar, and cuffs where body oils tend to accumulate. Do not wring, twist, stretch, or scrub the fabric. Any aggressive handling can distort the shape or cause the fibers to felt.
Step Six: Rinse Thoroughly
Drain the soapy water and refill the basin with clean cold water. Gently submerge the sweater and squeeze the clean water through it to remove all traces of detergent. Repeat this step two to three times until the water runs completely clear. Residual detergent left in the fibers can cause stiffness and may attract dirt more quickly.
Step Seven: Remove Excess Water
Do not wring the sweater. Instead, lift it from the water supporting its full weight, then lay it flat on a clean dry towel. Roll the towel and sweater together and gently press down along the entire length to absorb excess water. Unroll and check the sweater. If it still feels very wet, repeat with a second dry towel.
Step Eight: Reshape and Dry Flat
This step is critical. Lay the sweater flat on a fresh dry towel or a mesh drying rack and reshape it by hand to its original dimensions. Pull the sleeves to their correct length, smooth the body, and make sure the collar lies flat. Reshaping garments while damp is the only way to ensure they dry in the correct form.
Allow the sweater to air dry completely before wearing or storing it. This typically takes 12 to 24 hours depending on the thickness of the knit and the humidity in your home.
Can You Machine Wash Cashmere?
This is one of the most frequently asked questions in any cashmere sweater care guide, and the answer is nuanced. You can machine wash cashmere under very specific conditions, but it carries real risk and should only be done when the care label explicitly permits it.
Machine Wash vs Hand Wash: A Comparison
| Factor | Hand Wash | Machine Wash |
|---|---|---|
| Safety for fibers | Highest | Moderate to low |
| Risk of shrinkage | Very low | Moderate |
| Risk of pilling | Very low | Moderate |
| Convenience | Lower | Higher |
| Recommended for? | All cashmere | Labeled machine-washable only |
If you do choose to machine wash cashmere, place the sweater inside a mesh laundry bag to reduce friction. Select the delicate or wool cycle, which uses minimal agitation. Use cold water only and a small amount of mild detergent. Never use a spin cycle at high speed, as the centrifugal force can stretch and distort the fibers significantly.
For anyone who values their cashmere and wants to preserve it long-term, hand washing remains the superior choice every time. The few extra minutes it takes are well worth the extended lifespan of the garment.
How to Remove Stains from Cashmere
Stains on cashmere require a gentle but prompt approach. The most important rule is to act quickly. The longer a stain sits in the fiber, the harder it becomes to remove without resorting to harsh chemicals that can damage the fabric.
General Stain Removal Process
Blot the stain immediately with a clean white cloth, working from the outer edge inward to prevent spreading. Never rub, as rubbing pushes the stain deeper into the fibers. Once you have absorbed as much of the substance as possible, apply a small amount of mild detergent diluted in cold water to the stained area using a soft cloth or clean fingertip. Work it in very gently with circular motions, then rinse with cold water. Repeat as needed.
Food and Beverage Stains
For common food and drink stains such as wine, coffee, or juice, cold water rinsing combined with a mild detergent soak is usually effective. Avoid hot water, which sets protein-based stains permanently.
Oil and Grease Stains
For oil-based stains, apply a tiny amount of dish soap directly to the affected area and work it in gently before rinsing. Dish soap is formulated to cut through grease and is generally safe for cashmere when used sparingly.
Ink or Makeup Stains
These are among the more stubborn stains on delicate fabrics. A small amount of isopropyl alcohol applied with a cotton swab can lift ink carefully. For makeup, micellar water works well. Always test any solution on a hidden area of the sweater before applying it to the visible stain.
When to See a Professional
Some stains, particularly those involving dyes, bleach contact, or heavy soiling across a large area, are best handled by a dry cleaner who specializes in luxury knitwear maintenance. Do not attempt aggressive home treatment on a high-value piece if you are uncertain.
(See our guide on washing wool for more detailed stain removal tips on natural fiber garments.)
How to Dry a Cashmere Sweater Properly
Drying cashmere incorrectly is one of the leading causes of shrinkage and distortion. Understanding the flat drying method is essential to anyone serious about cashmere sweater care.
Never Use a Tumble Dryer
The heat and tumbling action of a dryer will shrink cashmere rapidly and irreversibly. Even a low-heat setting poses a significant risk. Tumble drying is never appropriate for cashmere regardless of what the cycle is labeled.
Avoid Hanging to Dry
Hanging a wet cashmere sweater on a hanger causes the weight of the water-saturated fabric to pull the garment out of shape, particularly at the shoulders. You will end up with pointed shoulder bumps and a stretched-out body that no amount of reshaping will correct once dry.
The Correct Method: Flat Drying
The flat drying method is the only safe approach. Lay the reshaped sweater on a clean dry towel or breathable mesh rack, away from direct sunlight, radiators, and heating vents. Natural airflow at room temperature is ideal. Turn the sweater over after several hours to allow the underside to dry evenly.
If you need to speed up the drying process slightly, placing a fan nearby to increase air circulation is acceptable, but do not use a hair dryer or direct heat source.
How to Store Cashmere Sweaters
Proper storage is the final step in a complete cashmere sweater care guide. Poor storage habits can lead to stretching, moth damage, and musty odors that are difficult to reverse.
Fold, Never Hang
Cashmere should always be stored folded, not hung. Hanging puts continuous stress on the fibers at the hanger points and will cause the shoulders and body of the sweater to lose their shape over time. Fold the sweater neatly along its natural seams and stack it on a shelf or in a drawer.
Use Cedar or Lavender to Deter Moths
Moths are attracted to natural protein fibers like cashmere and wool. Cedar blocks, cedar balls, or small sachets of dried lavender placed in your wardrobe or storage drawer are effective, natural deterrents. Replace them every few months as their potency fades. Avoid mothballs, which contain harsh chemicals that can damage fabric and leave a strong odor.
Store Clean Garments Only
Never store a cashmere sweater that has not been cleaned. Body oils, food residue, and invisible stains become more difficult to remove after months in storage and can attract moths. Always wash or dry clean cashmere before putting it away for a season.
Breathable Storage for Long-Term Keeping
For seasonal storage, use breathable cotton storage bags or acid-free tissue paper to wrap the sweater. Avoid plastic bags, which trap moisture and can encourage mildew. Store in a cool, dry place away from humidity and direct light.
Common Mistakes When Washing Cashmere
Even well-intentioned care can go wrong. These are the most frequent errors people make when trying to clean cashmere at home.
Using hot water is the single most damaging mistake. Hot water causes wool fibers to shrink and felt almost instantly. Always use cold to lukewarm water.
Wringing or twisting the sweater to remove water distorts the structure of the knit and stretches the fibers in ways that cannot be undone. Use the towel-rolling method instead.
Using regular laundry detergent strips natural oils from cashmere fibers, leaving the fabric dry, rough, and more prone to pilling. Always choose a detergent made for wool or delicates.
Washing too frequently causes unnecessary wear on the fibers. Cashmere does not need to be washed after every single wear. Airing it out after wearing and spot cleaning between washes is sufficient for most uses.
Ignoring pilling and trying to remove it aggressively can damage the weave. Use a cashmere comb or fabric shaver gently to address pilling.
Drying near heat sources or in direct sunlight causes uneven drying and can fade color while also risking heat damage to the fibers.
Do’s and Don’ts of Cashmere Care
Do always check the care label before washing. Do use cold water and a mild or wool-specific detergent. Do handle the sweater gently throughout the entire washing process. Do reshape the garment while it is still damp. Do dry flat on a towel or mesh rack away from heat. Do store folded in a cool, dry, breathable space. Do use cedar or lavender to protect against moths. Do spot clean between full washes to extend wear.
Don’t use hot water at any stage of washing or rinsing. Don’t wring, twist, or scrub the fabric. Don’t hang cashmere to dry or store it on a hanger. Don’t put cashmere in a tumble dryer. Don’t use bleach, fabric softener, or enzyme-based detergents. Don’t iron directly on cashmere without a pressing cloth. Don’t store cashmere unwashed or in plastic bags. Don’t wash cashmere after every single wearing unless it is visibly soiled.
Myth vs Fact: Cashmere Washing Edition
Myth: Cashmere always needs to go to the dry cleaner. Fact: Most cashmere can be hand washed safely at home with the right technique and detergent. Dry cleaning is best reserved for heavily structured or embellished pieces, or for stubborn stains you are not comfortable treating yourself.
Myth: Fabric softener makes cashmere softer. Fact: Commercial fabric softeners coat fibers with a silicone-based residue that can actually reduce cashmere’s natural softness over time and interfere with the fiber structure. If your cashmere feels stiff after washing, try a small amount of hair conditioner left in for a few minutes during the final rinse, then rinse out thoroughly.
Myth: Cashmere will always shrink when washed. Fact: Cashmere only shrinks when exposed to heat or aggressive agitation. Cold water washing with gentle handling effectively prevents shrinkage. Does cashmere shrink when washed in cold water? Not under normal hand washing conditions.
Myth: You can stretch shrunken cashmere back to its original size. Fact: Once cashmere has felted due to heat exposure, the fiber structure has changed permanently. You can attempt to wet block it by soaking in cold water with a small amount of hair conditioner and gently stretching it back into shape while damp, but results are limited. Prevention is far more effective than any cure.
Myth: Pilling means your cashmere is low quality. Fact: Fabric pilling is a natural result of wear on any wool or cashmere garment, even high-quality ones. Short-fiber cashmere pills more quickly than long-fiber varieties, but some degree of pilling is normal and manageable with a cashmere comb.
Myth: You should wash cashmere after every wear. Fact: Cashmere is naturally odor-resistant due to the lanolin content in wool fibers. Most cashmere sweaters only need washing every three to five wears unless visibly soiled. Over-washing accelerates fiber breakdown and pilling.
Quick Checklist: Cashmere Washing Summary
Before washing, check the care label, gather cold water, mild detergent, a clean towel, and a flat drying surface.
During washing, turn inside out, soak in cold water for 20 to 30 minutes, gently squeeze without scrubbing, and rinse until water runs clear.
After washing, press out excess water using a rolled towel, reshape by hand while damp, and dry flat away from heat and sunlight.
For storage, fold and place in a breathable bag with a cedar block or lavender sachet in a cool, dry location.
Conclusion
Learning how to wash and clean a cashmere sweater properly is one of the most valuable skills you can develop as the owner of luxury knitwear. The process requires nothing more than cold water, a gentle detergent, and a careful hand. By following a consistent natural fiber care routine, including proper drying with the flat drying method and correct storage practices, you can preserve the softness, structure, and beauty of cashmere for many years.
The most expensive cashmere sweater in the world is worthless if it is washed in hot water or dried in a tumble dryer. The cheapest cashmere sweater, cared for correctly, can feel like new for a decade. The difference is always in the technique, not the price tag.
If you follow the steps outlined in this cashmere sweater care guide, you will never have to worry about shrinkage, pilling, or ruined garments again. Take the extra few minutes to hand wash, reshape, and flat dry your cashmere, and it will reward you with seasons of wear and warmth.
(See our guide on washing wool for related natural fiber care techniques that apply across your knitwear wardrobe.)
Frequently Asked Questions
Can you machine wash a cashmere sweater?
Yes, you can machine wash cashmere only if the care label allows it and you use a delicate or wool cycle with cold water and a mesh laundry bag. However, hand washing remains the safest method to prevent stretching, shrinkage, and fiber damage. When in doubt, always choose hand washing over machine washing.
What is the best detergent for cashmere?
The best detergent for cashmere is a mild, pH-neutral formula specifically designed for wool or delicate fabrics. Popular options include Woolite, The Laundress Wool and Cashmere Shampoo, and Eucalan. Baby shampoo also works well as a gentle alternative. Always avoid detergents with enzymes, bleach, or brightening agents.
Does cashmere shrink when washed?
Cashmere shrinks when washed in hot water or exposed to agitation and mechanical heat. When washed correctly in cold water with gentle handling, cashmere does not shrink. Temperature control and minimal agitation are the two most important factors in preventing shrinkage during every wash.
How do you dry a cashmere sweater without ruining it?
Always dry cashmere flat on a clean towel or breathable mesh rack after reshaping it by hand while still damp. Never use a tumble dryer or hang cashmere to dry, as both methods cause irreversible damage. Keep the drying sweater away from direct sunlight, radiators, and any direct heat source.
How often should you wash a cashmere sweater?
Cashmere should be washed every three to five wears under normal conditions, not after every single use. Cashmere is naturally resistant to odor and bacteria due to its wool fiber content. Airing the sweater out between wears and spot cleaning as needed can significantly extend the time between full washes.
How do you remove a stain from cashmere?
To remove a stain from cashmere, blot it immediately without rubbing, then apply a small amount of mild detergent diluted in cold water to the area. Work it in gently with a clean cloth, then rinse with cold water. For grease stains, a tiny amount of dish soap works well. Act quickly for best results.
Can you iron cashmere?
You can steam or iron cashmere on a very low setting, but you must always use a pressing cloth between the iron and the fabric to prevent heat damage. A handheld garment steamer is a safer and more effective option for removing wrinkles from cashmere without any risk of scorching or flattening the fibers.
How do you store cashmere sweaters long-term?
Store cashmere sweaters folded in breathable cotton bags or wrapped in acid-free tissue paper. Place cedar blocks or lavender sachets nearby to repel moths. Keep garments in a cool, dry location away from humidity, light, and plastic bags. Always store clean cashmere, as unwashed garments attract moths and develop set-in stains.
Why does my cashmere sweater pill and how do I fix it?
Fabric pilling on cashmere happens when short fibers loosen and tangle together through friction during wear. It is normal and does not indicate poor quality. Use a cashmere comb or fabric shaver on a low setting to gently remove pills from the surface. Washing inside out and reducing friction during washing can slow future pilling.
Is it safe to use fabric softener on cashmere?
No, standard fabric softener is not recommended for cashmere. It leaves a synthetic coating on the fibers that diminishes the natural softness and breathability of the fabric over time. If your cashmere feels rough after washing, a small amount of hair conditioner left in during the final rinse and then thoroughly rinsed out is a safer and more effective alternative.
How do you hand wash cashmere step by step without shrinking it?
Turn the sweater inside out, soak it in cold water with mild detergent for 20 to 30 minutes, then gently squeeze the water through without wringing or scrubbing. Rinse in cold water until clear, press out excess moisture with a towel roll, reshape while damp, and dry flat away from all heat sources. Cold water is the key to preventing shrinkage throughout.
What should you do if cashmere gets wet in the rain?
If a cashmere sweater gets wet in the rain, gently press out excess water with a clean towel and then lay it flat to dry in its natural shape. Do not hang it or wring it out. As long as the sweater dries slowly at room temperature and is reshaped while damp, rain exposure should not cause permanent damage.
