How to Wash a Cashmere Cardigan? | Protect the Knit

Wash a cashmere cardigan by hand in cool water with wool detergent, then press — never wring — and dry it flat.

Whether you can wash cashmere at home comes down to water temperature and drying position, not luck. Hand-washing is the gentlest route and the one care guides agree on; the only exception is a care label that explicitly permits machine washing.

What You Need

Gather everything first — leaving wet cashmere in a basin while you hunt for a towel is how stretch marks happen.

• Cashmere or wool detergent or mild shampoo — nothing with enzymes, bleach, or fabric softener.
• Cool or lukewarm water.
• A flat drying surface — a dry towel on a table or a mesh drying rack.

Skip biological detergents entirely.

How to Hand-Wash Step by Step

Hand-washing takes about ten minutes of active work: soak, press, rinse, press again, dry flat. The cardigan never gets wrung, twisted, or scrubbed.

1. Fill a clean basin or sink with cool or lukewarm water.
2. Add a small amount of cashmere or wool detergent and swirl it in before the garment goes in. Detergent poured directly onto dry cashmere can leave a patchy mark.
3. Submerge the cardigan and gently swirl or press it through the water for a minute or two. No rubbing, scrubbing, or aggressive kneading.
4. Drain the basin and rinse with cool water until it runs clear, or lift the cardigan into a second basin of clean water. Running water straight onto the knit can distort it, so keep the faucet off the fabric.
5. Press the water out with flat hands. Do not wring or twist.
6. Roll the cardigan in a towel and press down to pull out more moisture.
7. Lay it flat on a dry towel or rack, reshape it to its original dimensions, and air-dry away from heat and direct sunlight.

When you lift it out of the final rinse, support the whole garment with both hands rather than letting it hang from one shoulder. Wet cashmere is heavy, and gravity is not on your side.

Drying Mistakes That Ruin the Shape

Heat and sunlight dry the fibers out and leave the knit stiff, so keep the drying rack out of direct sun and away from radiators.

Wash cashmere only when it needs it. Guidance varies, but many care guides suggest washing after several wears or once it looks or smells dirty, not after every wear. Between washes, airing the cardigan overnight handles most freshness problems.

Can You Machine-Wash Cashmere Instead?

Machine washing is only an option when the care label explicitly allows it. If it does not say so, hand-washing is the safe route — many care guides still recommend it over any machine cycle.

When the label permits it, use the wool or delicates cycle with cold or low-temperature water and a low spin. Put the cardigan in a mesh laundry bag first, and wash it alone or with other delicate knits. Zippers, buttons, and heavy fabrics abrade the surface and cause pilling, so keep them out of the load.

Wirecutter, Good Housekeeping, and The Laundress all treat hand-washing as the gentlest method, with machine washing as a conditional shortcut rather than a default. If you are weighing up which knit is worth the effort, a rundown of the best 100 cashmere cardigan options helps you judge quality before you buy.

The one rule that survives every method comes down to the fibers: cashmere is wool, and wool felts when it meets heat, agitation, and alkalinity at the same time. Remove any of the three and the knit survives.