Wool and Cashmere Care: The Complete Guide to Washing, Storing, and Keeping Your Knits Beautiful

Wool and cashmere fibres are nothing like cotton or synthetic blends. Each strand has a natural scale structure that can lock together under heat, agitation, or harsh detergent, causing shrinkage and felting that can't be undone.

Cashmere in particular is prized for its softness because the fibres are so fine, but that same fineness makes it more delicate than sheep's wool. Rough handling, high spin cycles, or the wrong wash temperature can flatten the loft that makes cashmere feel so luxurious in the first place.

Treating these fabrics with care isn't fussiness, it's what protects your investment. A well-loved wool sweater or cashmere jumper can last a decade or more when it's washed, dried, and stored properly.

The care label is your first and best guide, so it's worth learning to decode it. A wool wash symbol shows a stylised hank of yarn, while temperature dots or numbers tell you the maximum safe water temperature, usually cold or lukewarm for both wool and cashmere.

Look out for 'dry clean only' labels, which usually appear on tailored wool pieces, blazers, or cashmere garments with structured seams, linings, or embellishments. A crossed-out hand symbol means hand washing isn't recommended at all, so don't skip this step even if you're confident in your washing routine.

When in doubt, treat the garment as though it needs the gentlest option available. It's always easier to hand wash something that could have gone in a machine than to rescue a felted jumper.

Is it better to dry clean or hand wash cashmere? The honest answer is that both have their place. Simple knitwear without structure, lining, or embellishment can usually be hand washed safely at home, and many cashmere owners find this keeps the fibres soft and full without the chemical exposure of dry cleaning.

Cashmere dry cleaning is the safer choice for tailored coats, blazers, suits, and any wool or cashmere piece with a lining, shoulder pads, or delicate trims that could be damaged by water. It's also worth choosing professional cleaning if a garment has a stubborn stain, since incorrect at-home treatment can set marks permanently.

Can you wash wool and cashmere together? Generally yes, as long as colours are similar and both garments carry the same care instructions, since they respond to water and detergent in comparable ways. Just avoid mixing delicate cashmere with heavier wool items that might cause friction or pilling during the wash.

Hand washing wool at home is simpler than most people expect. Fill a basin with cool or lukewarm water and add a small amount of wool-specific detergent, avoiding regular laundry powder which can be too harsh on delicate fibres.

Submerge the garment and gently press the water through the fabric, never rubbing, twisting, or wringing. Five to ten minutes of soaking is usually enough to lift dirt and odour. Drain the basin and rinse with fresh water at the same temperature until the water runs clear.

To dry, press out excess water gently between two towels rather than wringing. Lay the sweater flat on a fresh towel, reshape it to its original dimensions, and leave it away from direct heat or sunlight until fully dry. Hanging cashmere while wet will stretch it out of shape permanently.

How often should you wash a cashmere sweater? Less often than you'd think. Airing it out after each wear and spot-cleaning marks is usually enough, with a full wash needed only every few wears or once a season unless it's visibly soiled.

Pilling is a natural result of friction against bags, jewellery, or upholstery, and it doesn't mean your sweater is wearing out. Removing pilling from cashmere is easy with the right tool: a fabric comb or cashmere-specific pilling comb works best, drawn gently in one direction across the surface.

A fine-toothed comb or even a disposable razor can work in a pinch, but move slowly and lightly to avoid snagging or thinning the fabric. Always work on a flat surface and check your progress often.

To restore softness after washing or wearing, a light steam from a distance can help revive the fibres without flattening them further. Avoid fabric softener, which coats natural fibres rather than nourishing them, and can actually dull cashmere's texture over time.

Storing wool sweaters correctly protects them just as much as washing them properly. Always fold cashmere and wool knits rather than hanging them, since hangers stretch the shoulders and create permanent marks over time.

Use breathable cotton garment bags rather than plastic, which traps moisture and encourages mildew. Cedar blocks or lavender sachets are natural, effective deterrents against moths, whose larvae are drawn to the lanolin and natural oils left in unwashed wool.

Always store knitwear clean, since moths are attracted to body oils and food residue rather than the fibre itself. A clean, dry, dark storage space with a little airflow is all wool and cashmere need to stay pristine until next season.