How to Hand Wash a Cashmere Sweater

Hand Washing Is the Gold Standard for Cashmere

Every cashmere care expert recommends hand washing as the safest cleaning method. You control every variable — water temperature, agitation level, soaking time, and rinsing. Nothing is left to a machine's interpretation of "gentle."

The process takes about 15 minutes of active work plus a 20-30 minute soak. Once you have done it twice, it becomes routine. And the results are consistently better than dry cleaning, which uses solvents that strip the natural oils that keep cashmere soft.

What You Need

• A clean basin or sink. Any container large enough to fully submerge the sweater. A clean sink, a plastic tub, or even a clean bucket works. Make sure it is free of soap residue from other cleaning products.
• Cold or lukewarm water. 20°C to 30°C (68°F to 86°F). If you cannot comfortably hold your hand in it, it is too hot. When in doubt, go colder.
• Cashmere or wool detergent. A pH-neutral, enzyme-free liquid formula. Baby shampoo is a reliable substitute. You need about one teaspoon per sweater.
• Two to three clean towels. For pressing out water and laying flat to dry.

Step-by-Step Hand Wash Process

Step 1: Prepare

Turn the sweater inside out. Check for stains — treat any spots by dabbing a small amount of detergent directly on the stain and letting it sit for 5 minutes before submerging.

Fill your basin with cold water. Add the detergent and swirl with your hand to distribute it evenly. The water should feel slightly slippery but not heavily sudsy — you want a mild solution, not a foam bath.

Step 2: Submerge and Soak

Place the sweater in the water and press it down gently until fully submerged. Do not drop it in — lower it slowly, supporting the weight. Let the water saturate the fibers naturally.

Soak for 20 to 30 minutes. You can gently press the sweater down a few times during the soak — this is not agitation, it is just helping the detergent solution flow through the fibers. Think of pressing a sponge, not wringing a cloth.

What not to do during soaking:

• Do not rub fabric against fabric — this felts the fibers
• Do not twist or wring — this stretches and distorts the knit
• Do not scrub stains — blot and press only
• Do not soak longer than 30 minutes — extended soaking weakens the fiber

Step 3: Drain and Rinse

Lift the sweater out of the basin by scooping it from underneath with both hands. Support its full weight — never let a wet cashmere sweater hang from one point, as the water weight will stretch the fibers.

Drain the soapy water. Refill with fresh cold water and submerge the sweater again. Press gently a few times to flush out the detergent. Drain and repeat until the water runs clear with no suds — usually two to three rinses.

Vinegar rinse (optional): On the final rinse, add one tablespoon of white vinegar per liter of water. Vinegar dissolves any remaining detergent residue and restores the fiber's natural pH. Do not worry about the smell — it evaporates completely as the sweater dries.

Step 4: Remove Excess Water

This is where most people make mistakes. Never wring, twist, or hang a wet cashmere sweater. The correct method:

1. Lay a clean, dry towel flat on a surface
2. Place the sweater flat on the towel
3. Roll the towel and sweater together like a jelly roll
4. Press down firmly on the roll — use your body weight if needed. The towel absorbs the water through pressure, not wringing.
5. Unroll and check. If the sweater is still dripping, repeat with a second dry towel.

After this step, the sweater should be damp but not dripping. It will still feel heavy — that is normal. Cashmere holds moisture in the fiber structure and releases it slowly during air drying.

Step 5: Shape and Dry

Lay a fresh dry towel on a flat surface — a table, a drying rack, or even the floor works. Place the sweater on the towel and reshape it to its original dimensions:

• Smooth the shoulders to their original width
• Straighten the side seams
• Align the cuffs and hem
• Gently pull the body to its original length — do not overstretch
• Smooth out any wrinkles with your palms

This shaping step is critical because cashmere sets its shape as it dries. If you skip it, the sweater dries in whatever position it landed in.

Flip the sweater once during drying — roughly halfway through — so both sides get even airflow. Keep it away from direct sunlight, radiators, and any heat source. Room temperature air drying is the only safe method.

Full drying takes 12 to 24 hours depending on knit weight, humidity, and air circulation. A fan pointed at the sweater from a distance speeds things up safely.

Frequency: How Often to Hand Wash

Situation	Wash Frequency
Worn over a base layer, light activity	Every 5-7 wears
Worn against skin, moderate activity	Every 3-4 wears
Worn during exercise or heavy sweating	After every wear
Stained or visibly soiled	Immediately
Before seasonal storage	Always — clean cashmere is less attractive to moths

Between washes, air the sweater overnight after each wear. Cashmere fibers release absorbed odors and moisture naturally when given airflow. For more on wear rotation and daily care, see our complete cashmere care guide.

Troubleshooting Common Issues

Sweater feels stiff after drying. Likely detergent residue. Re-wash with the vinegar rinse method described above. Use less detergent next time — a teaspoon is enough.

Sweater stretched during washing. You may have handled it too much while wet, or let it hang when lifting it out. While still damp, gently push the sweater back to its original dimensions and pin it to the drying towel. For future washes, always support the sweater's full weight when lifting.

Color bleeding. Some dyed cashmere releases color in the first wash. This is more common with dark or vibrant colors. Always wash dark cashmere separately. If you notice color in the water, do not panic — rinse quickly with cold water and add a tablespoon of white vinegar to help set the dye.

Pilling after washing. Some pilling after washing is normal, especially in newer sweaters. Once the sweater is completely dry, use a cashmere comb to gently remove pills. The pilling decreases with each wash as the loose surface fibers are removed.

Mild shrinkage. If the sweater is slightly smaller after drying, re-wet it with cold water (just damp, not soaked), then gently stretch it back to its original dimensions and pin it flat to dry under tension. This works for shrinkage up to about 10-15%. See our cashmere shrinkage guide for more severe cases.