You are standing over the sink with a silk blouse, or holding an expensive cashmere jumper, wondering whether one wrong move will ruin it. These fabrics make an outfit feel expensive — and they are the ones most easily damaged by an ordinary wash. Caring for them is mostly about knowing what each fabric hates, and then not doing that.
This guide explains how to care for silk, cashmere, velvet and wool: washing, drying, ironing, storing, and keeping moths away.
How to Care for Silk, Cashmere, Velvet and Wool: Five Rules for All Four Fabrics
Three of the four are protein fibres, and all four are damaged by heat, harsh detergent, chlorine bleach and rough handling.
- Water cool — 30°C (86°F) or below, the repeated safe ceiling in the guides consulted.
- Gentle, pH-neutral detergent, or one made for wool. Standard detergents often contain protease enzymes, which eat protein fibre — as does chlorine bleach.
- Never wring or tumble-dry. Roll the garment in a clean towel to press water out.
- Dry flat, out of direct sun. Knits stretch if hung wet; sunlight damages silk.
- Care label first — follow it over any advice here. “Dry clean only” is the starting point.
Wash these fabrics less often: airing, spot-cleaning and brushing usually do. Wash when a garment is actually dirty or smells, not on a schedule.
How to Wash Silk at Home Without Damaging It
Silk is a protein fibre made of fibroin, damaged by heat, sunlight, chlorine bleach and enzyme detergents. It also water-spots, so the method matters as much as the detergent.
Hand-wash in cool water, 30°C (86°F) or below, with a pH-neutral detergent. Move it gently through the water; do not rub, twist or wring it. Rinse in cool water — one silk guide (Bradic) suggests a final rinse with a splash of white vinegar.
The machine-washing question — resolving a real contradiction. The guides disagree: one source says its own silk is machine-washable; others say never. The risk is agitation, heat and the wrong detergent. A sturdy silk garment whose label explicitly says machine-washable can go in on a cold, delicate cycle in a mesh bag. Otherwise, don’t — and when label and general advice disagree, the label wins.
Dry, iron, store. Towel-roll, press gently, then lay flat out of direct sunlight for 12–24 hours. Never hang wet silk or tumble-dry it. Iron on low while slightly damp, or steam. Hang blouses and dresses on padded hangers; fold silk knits. Moth risk is medium.
Can You Machine Wash Cashmere?
Cashmere is a protein fibre, like wool. It felts, pills and shrinks under heat, moisture and agitation, and it is the most moth-prone fabric in this guide.
Hand-wash in lukewarm water — 30°C (86°F) or below — with a wool-specific detergent. Standard detergents can contain protease enzymes that damage protein fibre. Soak for up to 30 minutes, rinse in cool water until it runs clear, and never wring it.
Can you machine wash cashmere? Hand-washing is safer and is the default. If the label allows machine-washing, use a cold wool or delicate cycle in a mesh bag. If it says hand wash or dry clean only, hand-wash it or take it to a cleaner.
Dry, iron, store. Towel-roll, reshape, and dry flat for 12–24 hours. Never hang a wet cashmere jumper — the water’s weight stretches the loops — and never tumble-dry it. Steam wrinkles out, or iron on low. Always fold cashmere; hanging stretches knits. Moth risk is high.
Wash cashmere rarely — airing between wears is usually enough.
How to Care for Velvet Clothes
Velvet’s risk is the pile, not shrinking: its raised surface can be crushed permanently, and water can leave marks. First, know what your velvet is made of.
Know your velvet first. Cotton or synthetic velvet is usually washable at home. Silk velvet, and any embellished, lined or structured velvet, generally needs a professional cleaner. Check the label before anything else.
Wash and dry. For washable velvet, hand-wash in cold water with a gentle detergent. Do not rub the pile. For silk velvet, do not wash it at home — take it to a cleaner. Air-dry, out of direct sunlight; never tumble-dry.
Never iron velvet pile directly. An iron crushes the pile and can leave a permanent flat mark. Steam instead: hold a steamer a few centimetres away, let the steam relax the pile, then brush the nap gently.
Hang or fold? Hang velvet on padded hangers so the pile is not creased, in breathable cotton dust bags rather than plastic. Do not fold velvet tightly; fold lines can mark the pile. Moth risk follows the fibre: silk velvet is medium risk, cotton and synthetic velvet low.
How to Wash Wool Without Shrinking or Felting It
Wool shrinks because of felting: wool fibres have tiny scales, and under heat, moisture and agitation those scales interlock and lock the fibres together. Heavy felting is irreversible.
Hand-wash in cool water, 30°C (86°F) or below, with a wool-specific detergent. Do not use a standard detergent with protease enzymes, and never use chlorine bleach. Soak briefly and rinse in water at the same temperature. Do not agitate, rub or wring. Machine-wash wool only if the label allows it, on a cold wool or hand-wash cycle.
Dry, iron, store. Towel-roll, reshape, and dry flat away from direct sunlight and radiators. Never tumble-dry wool: the dryer combines all three felting ingredients — heat, moisture and agitation. Wool responds well to steam; if you iron, use medium heat. Fold wool knitwear, always — hanging stretches knitted loops. Woven wool such as tailored trousers and jackets can hang. Moth risk is high.
The Per-Fabric Care Table
| Fabric | Wash | Detergent | Dry | Iron / steam | Hang or fold | Moth risk |
|---|---|---|---|---|---|---|
| Silk | Cool, ≤30°C, hand wash | pH-neutral, no enzymes/bleach | Towel-roll, flat 12–24 hrs | Low iron or steam | Hang blouses; fold knits | Medium |
| Cashmere | Lukewarm, ≤30°C, hand wash | Wool-specific, no enzymes/bleach | Towel-roll, flat 12–24 hrs | Steam preferred | Always fold | High |
| Velvet | Cold, hand wash if fibre allows | Gentle; check fibre first | Air-dry; never tumble-dry | Steam only, never iron pile | Hang on padded hangers | Medium (silk); low (cotton/synthetic) |
| Wool | Cool, ≤30°C, hand wash | Wool-specific, no enzymes/bleach | Towel-roll, flat, away from heat | Steam preferred | Fold knits; hang tailored wool | High |
How to Store Cashmere and Wool So Moths Don’t Eat Them
Moth larvae — not adult moths — eat keratin, the protein in wool, cashmere, silk, angora, mohair and alpaca. The damage happens in storage.
Wash before storing. Body oils and food marks attract moths and yellow fibres in storage. Never pack away a dirty jumper — wash or clean everything first, and let it dry completely.
The airtight-plastic question — resolving the second contradiction. One guide recommends airtight containers; others warn sealed plastic traps moisture and causes mildew. If your space is dry and garments fully dry, a clean airtight container is reasonable. If there is any dampness, sealed plastic is risky — trapped moisture leads to mildew. The safer default is breathable cotton bags in a dry place. Either way, garments must be fully dry first.
Does cedar keep moths away from cashmere? Cedar contains cedrol, which repels moths — but it does not kill larvae or eggs. It is a deterrent, not a cure. To kill moths at every life stage, freeze at −18°C for 72 hours.
Routine. Store knitwear folded, in breathable bags, in a cool, dry place. Inspect garments every few weeks. Silk blouses can hang; silk knits should be folded.
How to Remove Stains from Silk — and the Other Fabrics
Blot — never rub — a fresh stain, working from the outside in. Rubbing pushes the stain deeper and can damage silk and velvet.
Water spots on silk. Water can mark silk, especially darker colours. For a light spot, steaming lightly can help — but on valuable or dark silk, use a professional cleaner.
Oil and grease. Blot up what you can, then sprinkle talcum powder or cornstarch on the mark and brush it off gently.
Red wine and coloured spills. Blot immediately and rinse with cool water if the label allows it. Do not apply heat.
Stains on cashmere and wool. Blot, then hand-wash with a wool-specific detergent if the label allows it. If the stain does not lift after one gentle attempt, take it to a cleaner.
Mistake Fixes: What to Do When Something Already Went Wrong
How to fix a shrunken cashmere or wool sweater. This works only for mild shrinkage. Soak it in lukewarm water with hair conditioner or baby shampoo for about 30 minutes — widely repeated guidance, not a guaranteed fix. Press out the water and stretch it back to shape on a flat towel. If the fibres have heavily felted, the shrinkage is irreversible.
Crushed velvet pile. Steam the crushed area, then brush the nap gently upward while the fabric is still warm. If the pile has been ironed flat, the damage may be permanent.
Silk water spots. Light steaming can sometimes even out a light mark, but dark or valuable silk should go to a cleaner.
Cashmere pilling. Pilling is normal for cashmere. Remove pills with a cashmere comb or fabric shaver, gently, in one direction. Do not pull pills off by hand.
When to Use a Professional Cleaner — Decision Box
- Silk: lined, structured or embellished silk; tailored silk; unknown or large stains; anything “dry clean only”.
- Cashmere: structured, tailored or lined cashmere; coats and blazers; heavy stains; anything “dry clean only”.
- Velvet: silk velvet; embellished or lined velvet; blazers, coats and tailored pieces; unidentified stains.
- Wool: tailored wool — suits, coats, blazers; lined or structured pieces; heavy stains; anything “dry clean only”.
If the garment is structured, lined or embellished, or the stain is unknown or large, a cleaner is worth the cost.
The Wash-and-Store Checklist
Before washing: read the care label; blot stains, don’t rub; mesh bag for machine-washing; cool water (30°C / 86°F or below); gentle or wool-specific detergent.
Washing and drying: hand-wash gently; never wring, rub or agitate; towel-roll to remove water; never tumble-dry; dry flat, out of direct sunlight, for 12–24 hours.
Ironing and storage: steam velvet, never iron its pile; steam cashmere and wool; iron silk on low; fold all knitwear; hang only woven garments and silk blouses on padded hangers; wash before storing and dry fully; store in breathable cotton bags in a cool, dry place; freeze at −18°C for 72 hours if you find moths.
Common Mistakes and Fixes
| Mistake | What happens | Fix |
|---|---|---|
| Hot water | Felting, shrinkage; damage to silk | Wash at 30°C or below |
| Enzyme detergent | Enzymes eat protein fibres | pH-neutral or wool detergent |
| Wringing a wet jumper | Stretches fibres | Towel-roll and press instead |
| Tumble-drying | Heat, moisture and agitation cause felting | Dry flat, away from heat |
| Hanging knitwear | Gravity stretches the loops | Fold all knitwear |
| Ironing velvet directly | Pile crushes permanently | Steam only, brush the nap |
| Storing dirty clothes | Oils yellow fibres; moths are attracted | Wash before storing |
| Sealed plastic in a damp room | Trapped moisture causes mildew | Breathable bags; airtight only when dry |
| Ignoring the care label | The label knows the garment | Follow the label over general advice |
Shopping and Care-Label Guidance
If you are buying silk, cashmere, velvet or wool, the care label is part of the purchase decision: “dry clean only” means a cleaner’s bill every time it needs cleaning.
See also our guides to building a capsule wardrobe on a budget, our quiet-luxury capsule wardrobe, investment pieces worth buying, the old-money colour palette and winter outfits.
Frequently Asked Questions
How do I wash silk at home without damaging it?
Hand-wash in cool water, 30°C (86°F) or below, with a pH-neutral detergent. Towel-roll dry and lay flat out of direct sunlight.
Can you machine wash cashmere?
Sometimes, but hand-washing is safer. If the label allows it, use a cold delicate cycle in a mesh bag.
How do I wash wool without shrinking or felting it?
Keep the water cool, 30°C (86°F) or below, use a wool-specific detergent, avoid agitation, and never tumble-dry.
How do I care for velvet clothes?
Check the fibre: cotton or synthetic velvet is usually washable at home; silk velvet needs a cleaner. Never iron velvet — steam it.
How do I store cashmere and wool so moths don’t eat them?
Wash before storing, dry fully, fold, and store in breathable cotton bags in a cool, dry place.
Does cedar keep moths away from cashmere?
Cedar repels moths but does not kill larvae or eggs. Use freezing for an infestation.
How do I fix a shrunken cashmere or wool sweater?
For mild shrinkage, soak in lukewarm water with hair conditioner for 30 minutes, then stretch back to shape and dry flat.
Conclusion
Cool water, gentle detergent, no wringing, no tumble-dryer, dry flat, fold your knits, store everything clean and dry. Learn each fabric’s one weakness — silk water-spots, cashmere pills and felts, velvet pile crushes, wool shrinks — and work around it. When a garment is structured, lined or “dry clean only”, let a professional handle it. Your favourite pieces can last for years.
