How to Wash Knitwear Without Ruining It

Wash knitwear inside out at 30°C or below, on a gentle cycle, in a mesh bag, at a low spin speed. Never wring it, never tumble dry it, and always dry it flat. Those six habits prevent almost every way a knit gets ruined at home.

Most knitwear damage is not caused by washing. It is caused by three specific things: heat, agitation and gravity. Heat shrinks and felts. Agitation abrades the surface into pills. Gravity stretches a wet garment out of shape while it dries. Every rule below is really about avoiding one of those three.

How often should you actually wash a knit?

Less often than you think. Knitwear is not underwear — it does not sit against the skin the whole day in the same way, and washing is the main thing that wears it out.

Every 3 to 5 wears for a piece worn over something else.
Every 2 to 3 wears for a knit worn directly against the skin in Indian heat, where sweat is a factor.
Spot-clean instead for a single mark. Cold water, a little mild detergent, blot rather than rub.
Air it between wears. A night on a flat surface in moving air removes most odour without any washing at all.

Machine washing, step by step

1. Turn it inside out

The single most effective habit

The drum abrades whichever surface faces outward. Turning the garment inside out means the wear happens on the inside, where nobody sees it. This one change does more to prevent pilling than anything else on this list.

2. Use a mesh laundry bag

It reduces friction against the drum and stops sleeves stretching as they tangle with other items. Inexpensive and reusable. If your knit contains any synthetic fibre, a bag designed to capture microfibres does the same job and catches shed fibres as well.

3. Wash with similar fabrics only

Denim, towels, zips and Velcro are all abrasive. A single pair of jeans in the load will pill a fine knit faster than ten washes on its own.

4. Set 30°C or below, gentle or wool cycle

Heat is what shrinks cotton and felts wool. A cold wash cleans knitwear perfectly well, because the soil on a knit is body oils rather than heavy dirt.

5. Reduce the spin speed

High spin presses fabric hard against the drum and forces water through the structure under pressure. 600 to 800 rpm removes enough water without the abrasion.

6. Use less detergent, and no softener

Excess detergent leaves residue in the loops that stiffens the fabric. Fabric softener coats fibres to make them feel soft, which reduces breathability — the opposite of what you want in a cotton knit. Skip it entirely.

Close up of knitting yarn showing the loop structure that holds water — Knitted fabric is loops, not a flat sheet. Water sits inside the loop structure, which is why a wet knit is so much heavier — and why gravity does so much damage.

Cotton yarn cones for knitwear production — Knitted fabric is loops, not a flat sheet. Water sits inside the loop structure, which is why a wet knit is so much heavier — and why gravity does so much damage.

Hand washing

Gentler than any machine cycle, and worth it for pieces you care about most.

Fill a basin with cool water and dissolve a small amount of mild detergent before the garment goes in.
Submerge and press gently. Do not rub, twist or agitate — that is exactly what felts and pills fabric.
Soak for 10 to 15 minutes. No longer; extended soaking weakens fibres.
Rinse in clean cool water until no suds remain.
Never wring. Support the whole garment as you lift it, or the weight of the water will stretch it. Press water out against the side of the basin.
Lay flat on a towel, roll the towel up with the garment inside, and press. This removes most of the remaining water without any twisting.

Drying — where most knits are ruined

Never hang a wet knit. A soaked knit can hold several times its own weight in water, and hanging it puts all of that weight on the shoulders. The loops stretch and do not recover. This is the single most common way a good knit is permanently damaged — and it happens on the first wash, not the tenth.

Instead: reshape the garment to its correct dimensions while damp, lay it flat on a dry towel or a mesh rack, and leave it out of direct sunlight. Sun fades colour and can make cotton brittle over time. Turn it once partway through so both sides dry evenly.

In Indian humidity, drying takes longer than you expect. Keep air moving — a fan on low, or a room with cross-ventilation. A knit left damp too long in a closed room will smell musty and can mildew.

Never tumble dry. Heat and tumbling together are the most efficient way to shrink and pill a garment ever devised. On any fabric containing acrylic, heat can also permanently flatten the surface.

Care by fibre

Fibre	Wash	Watch for
Cotton	30°C, gentle, inside out. Fairly forgiving.	Shrinks with heat. Never hot wash or tumble dry.
Cotton-rich blends	30°C, gentle, inside out, low spin.	Resist shrinking well, but heat can flatten the surface permanently. Use a microfibre-catching bag.
Merino wool	Wool cycle or hand wash, wool detergent.	Felts with heat and agitation. Irreversible.
100% acrylic	Cool, gentle.	Pills readily. Heat can permanently flatten the surface.

Our knits are 100% cotton or GRS certified 60% recycled cotton, 40% recycled acrylic, listed on each product page. Both follow the same routine. The blend is slightly more resistant to shrinking than pure cotton, but no more tolerant of heat.

Fixing what has already gone wrong

A stretched-out knit

Wash it in cool water, then reshape while damp to the measurements it should be and dry flat. Cotton and cotton-rich blends often recover substantially. Wool responds better than most. If the fibres have been stretched past their recovery point, this will improve the shape but not fully restore it.

A shrunken knit

Soak in cool water with a capful of hair conditioner for 15 minutes to relax the fibres, then gently stretch back towards shape while damp and dry flat. This works reasonably on cotton. Felted wool cannot be reversed — the fibres have physically interlocked.

A musty smell after monsoon storage

Air it in moving air for a day before washing. If the smell persists, wash cool with a small amount of white vinegar in the rinse, then dry flat with good airflow.

Frequently asked questions

Can you machine wash knitwear?

Yes, most cotton and cotton-rich knits machine wash well. Turn the garment inside out, place it in a mesh bag, use a gentle cycle at 30 degrees Celsius or below with a low spin speed, and dry flat. The combination of low heat and low agitation is what protects it.

What temperature should you wash knitwear at?

30 degrees Celsius or below. Cold water cleans knitwear effectively because the soiling is mostly body oils rather than heavy dirt, and heat is the main cause of shrinkage in cotton and felting in wool.

How often should you wash a sweater?

Every three to five wears for a knit worn over another layer, or every two to three wears if it is worn against the skin in hot weather. Airing a knit between wears removes most odour without washing, and less frequent washing significantly extends its life.

Why should you not hang knitwear to dry?

A wet knit holds a great deal of water, and hanging it concentrates all that weight on the shoulders. The knitted loops stretch under the load and do not return to shape, permanently distorting the garment. Always dry knitwear flat.

Can you tumble dry knitwear?

No. The combination of heat and mechanical tumbling shrinks natural fibres, felts wool and abrades the surface into pills faster than anything else. On fabrics containing acrylic, heat can also permanently flatten the surface. Dry flat, away from direct sunlight, instead.

Should you use fabric softener on knitwear?

No. Fabric softener works by coating fibres, which reduces breathability and moisture absorption. On a cotton knit chosen specifically for those properties, softener works against the reason you bought it. It can also build up in the loop structure over time.

How do you reduce microfibre shedding when washing?

Wash less often, use cooler and shorter cycles, avoid high spin speeds, and wash synthetic-containing garments in a filter bag designed to capture microfibres. Fuller loads also help, because garments rub against each other less.

How do you fix a stretched sweater?

Wash it in cool water, then reshape it to the correct measurements while still damp and dry it flat. Cotton and cotton-rich blends recover to a useful degree. Fibres stretched beyond their recovery point will improve but may not return fully to the original shape.

The short version

Inside out, mesh bag, 30°C, gentle cycle, low spin, dry flat. Wash less often than you think, air more often than you do, and never let a wet knit hang. That is the whole method.

More on removing pilling, the yarn we use, or browse the knitwear collection.