How To · Men's Style · Fabric Care
The Right Way to Wash Wool and Cashmere at Home
Wool and cashmere don't belong in your washing machine—but they're far easier to care for than their reputation suggests. Here's the precise method that keeps them soft, shaped, and wearable for years.
5 min read · IrisWool and cashmere are protein fibers that respond to heat, agitation, and alkaline detergents the way skin responds to harsh soap—they swell, felt, and lose their shape. The good news: hand-washing at home takes ten minutes and costs nothing. The better news: you'll actually do it, which means your pieces last longer than if you dry-clean them every month.
The method below works for everything from merino crew necks to cashmere scarves. It's based on how professional conservators treat delicate textiles, but simplified for your bathroom sink. No special equipment required.
Wool and cashmere are protein fibers that respond to heat and agitation the way skin responds to harsh soap—they swell and felt.
What you'll need.
- 01Basin, sink, or bucket
- 02Wool-specific detergent (Eucalan, Soak, or Woolite Delicates)
- 03Cool water (65–75°F / 18–24°C)
- 04Clean towels (microfiber or cotton preferred)
- 05Flat drying surface (bed, rack, or floor)
- 06Cedar block or lavender sachet (optional, for storage)
- 07Fabric comb or de-pilling tool (optional, for maintenance)
Step one · 1 minute
Fill a basin with cool water and add wool-specific detergent
Use a basin, sink, or bucket large enough to fully submerge your garment. Fill it with cool water—aim for 65–75°F (18–24°C); cold water is fine, but warm water will cause felting. Add 1–2 teaspoons of wool-specific detergent like Eucalan, Soak, or Woolite Delicates. Stir gently until the detergent dissolves. Avoid regular laundry detergent, which is too alkaline and will strip the fibers.
If you don't have wool detergent, baby shampoo works in a pinch—it's pH-neutral and gentle.
Step two · 2 minutes
Submerge the garment and let it soak
Gently place your folded sweater, cardigan, or scarf into the soapy water. Press it down so it's fully submerged, but don't agitate it. Let it soak for 10–15 minutes. This allows the detergent to penetrate and lift dirt and oils without you having to scrub. For lightly soiled pieces, 5 minutes is enough.
Fold the garment loosely so water can reach all surfaces. Avoid bunching it into a tight ball.
Step three · 2 minutes
Gently press and release to rinse
Drain the soapy water. Refill the basin with fresh cool water. Gently press the garment against the basin bottom, then release—repeat this 8–10 times. This mimics the gentle squeezing action that removes soap without wringing or twisting fibers. Drain and repeat with fresh water until the water runs clear and you don't see soap suds. This usually takes 2–3 rinses.
Never wring, twist, or scrub. Wet wool is fragile and will stretch or felt if you apply pressure in one direction.
Step four · 1 minute
Remove excess water without wringing
Lift the garment gently and support it with both hands. Let water drip back into the basin for a few seconds. Then, lay it flat on a clean towel. Fold the towel over the garment and gently press down—the towel will absorb water without you having to squeeze the fibers. Roll the towel loosely around the garment if needed, but don't wring it.
A microfiber towel or old cotton t-shirt works better than a thick bath towel, which can trap moisture.
Step five · 4 minutes
Lay flat to dry away from heat and direct sunlight
Transfer the damp garment to a clean, flat surface—a spare bed, drying rack, or clean towel on the floor works. Smooth it gently into its original shape. Make sure it's laid completely flat; hanging wet wool will stretch it out of shape. Place it in a cool, well-ventilated area away from direct sunlight, radiators, and air vents. Drying takes 12–24 hours depending on thickness and humidity.
Reshape the neckline, cuffs, and hem while it's still damp. This takes 30 seconds and prevents them from drying wavy.
Step six · Ongoing
Fold and store properly to prevent pilling and moths
Once fully dry, fold the garment neatly and store it in a breathable container—a drawer, shelf, or cotton storage bag. Do not use plastic bags, which trap moisture. If you live in a humid climate or store pieces long-term, add a cedar block or lavender sachet to deter moths. Avoid wire hangers, which create shoulder dimples in knits.
Pilling is normal on wool and cashmere. Use a fabric comb or de-pilling tool every few months, not a razor, which damages fibers.
How to know it worked.
Your garment should feel soft, smell fresh, and fit the same way it did before washing. The fibers should lie flat and uniform. If it feels stiff, you may have used water that was too hot or detergent that was too strong; next time, use cooler water and less soap.
Questions at the mirror.
Can I machine-wash wool or cashmere on a delicate cycle?
Technically, some modern machines have a wool cycle designed for this. But hand-washing gives you complete control and takes the same amount of time. If you must machine-wash, use a mesh laundry bag, cold water, wool detergent, and a gentle cycle—then lay flat to dry immediately.
What if my sweater still smells after washing?
Odor usually means it didn't rinse completely. Repeat the rinse step one more time, pressing gently. If it still smells after drying, soak it again in fresh water with detergent for 15 minutes, then rinse thoroughly.
How often should I actually wash wool and cashmere?
Less often than you think. Wool naturally resists odor and stains. Wash after every 3–4 wears, or only when visibly soiled. Cashmere can go even longer between washes. Airing garments outside for a few hours refreshes them without washing.
Is dry cleaning better than hand-washing?
No. Dry cleaning uses harsh chemicals and heat that break down fibers over time. Hand-washing is gentler and extends the life of your pieces. Reserve dry cleaning for stains you can't handle yourself.