The care label decides everything.
What You Need
Skip bleach, enzyme or “biological” detergents, heavy-duty formulas, and fabric softener — Woolmark recommends a gentle, wool-safe product for animal fibers, and enzymes attack the protein in cashmere. Fabric softener flattens the natural loft. Measure the detergent instead of guessing at a capful; over-dosing leaves residue that stiffens the knit.
A tested comparison of wool and cashmere formulas is the best detergent for wool and cashmere picks worth checking before you buy. Otherwise, ask the label: if home washing is allowed, the water temperature, cycle, and spin limits printed there outrank every general rule here.
How Do You Hand-Wash Cashmere Step By Step?
No rubbing, scrubbing, kneading, or twisting.
- Check the label. Hand wash only if the tag says hand wash or machine wash. “Dry clean only” means stop.
- Fill the basin.
- Turn the sweater inside out and lower it in while supporting its full weight. Never lift it by one sleeve or shoulder.
- Soak and press.
- Rinse at the same temperature. Drain while supporting the sweater, refill with clean water at a matching temperature, repeat until no suds remain. Temperature swings push wool into felting.
- Remove water by pressing. Lay the sweater on a clean towel, roll loosely, and press. Never twist the towel into a rope.
- Reshape and dry flat. While damp, coax the knit to its original measurements and lay flat on a dry towel at room temperature, away from sun and radiators.
Success: the sweater holds its shape, feels soft rather than stiff, and dries with no stretched cuffs or sagging hem. A stiff dry usually means detergent residue — rinse once more in cool water before the next wear.
| Care Step | Right Choice | What Goes Wrong Otherwise |
|---|---|---|
| Water temperature | Cool to lukewarm, about 86°F | Heat felts fibers and shrinks the knit |
| Soak time | About 10 minutes, up to 30 if the label allows | Long soaks plus agitation thin the yarn |
| Agitation | Gentle pressing only | Rubbing and twisting distort the shape |
| Detergent | Mild wool or cashmere formula | Enzymes and bleach damage protein fibers |
| Water removal | Press into a rolled towel | Wringing stretches and misshapes the garment |
| Drying method | Flat, shaded, room temperature | Hanging stretches wet knit; heat sources shrink it |
| Wash frequency | Every few wears, not every wear | Frequent washing wears fibers out early |
Can Cashmere Go In The Washing Machine?
Only when the care label names a machine cycle, and then only on the coldest, slowest setting. John Lewis advises against washing after every use, and machine agitation is why.
Those numbers belong to that brand, not every sweater — your label is the authority. Use a mesh laundry bag, select the wool or delicate cycle, and stop the machine before the high-spin portion if possible.
After a machine wash: press out water, reshape while damp, dry flat. If your machine’s lowest spin runs faster than the label permits, hand washing is safer.
Why Did My Cashmere Shrink Or Get Holes?
Shrinkage and holes trace back to a short list: hot water, agitation, rough drying, or the wrong detergent.
- Shrinking and felting: heat, friction, and sudden temperature changes during washing or rinsing.
- Holes and thin spots: enzyme detergents, bleach, and fabric softener breaking fibers down over repeated washes.
- Stretched shoulders and hems: hanging a wet sweater, where its own weight pulls the knit out of shape.
- Stiff, scratchy feel: leftover detergent that never rinsed out.
Once wool fibers felt together, the change is permanent — no soak or conditioner undoes it. Prevention comes down to cool water, mild detergent, and a flat dry.
Sources
- Woolmark. “Wool Washing & Wool Care.” Care guidance for washing animal-fiber garments at home.
- John Lewis & Partners. “Where Does Cashmere Come From?” Hand-wash procedure, soak times, and detergent cautions for cashmere.
- Zadig & Voltaire. “Materials | Cashmere.” Manufacturer temperature and spin limits for machine-washing cashmere.