The Expert Guide to Keeping Jumpers Fresh, Soft and Long-Lasting
Wool and knitwear are some of the most comforting pieces in our wardrobes, soft jumpers, cosy cardigans, scarves we reach for daily in colder months. Yet they’re also among the most misunderstood when it comes to care.
One of the most common questions we’re asked is simple:
How often should you actually wash wool and knitwear?
The answer may surprise you and if you’ve ever worried about overwashing, shrinking, or wearing your favourite jumper out too quickly, this guide is for you.
The short answer: far less often than you think
Unlike cotton or synthetics, wool is naturally breathable, odour-resistant and self-regulating. That means it doesn’t need washing after every wear and in most cases, washing too often does more harm than good.
For most wool and knitwear:
- Every 5-10 wears is usually enough
-
Sometimes even less, if you’re caring for pieces properly between wears
Understanding why makes all the difference.
Why wool doesn’t need frequent washing
Wool fibres behave very differently from synthetic or cotton fibres.
1. Wool naturally resists odour
Wool fibres absorb moisture vapour (like sweat) but release it back into the air, rather than trapping it. This makes it harder for odour-causing bacteria to build up.
2. Wool is self-cleaning to a degree
When aired properly, wool fibres naturally freshen up often restoring their softness and scent without water or detergent.
3. Washing wears fibres over time
Even gentle washing causes friction. Washing too frequently can lead to:
- Loss of softness
- Pilling
- Stretching or misshaping
-
Faster ageing of fibres
Less washing = longer life.
How often to wash different knitwear pieces
Jumpers & cardigans
- Every 5-10 wears, depending on use
-
If worn over a base layer and aired properly, you can often go longer
Cashmere
- Every 6-8 wears is usually ideal
-
Cashmere actually benefits from occasional washing, but not frequent washing
Merino wool
- Naturally odour-resistant
-
Often needs washing less often than other knits
Wool scarves & shawls
- Usually once or twice a season, unless visibly soiled
-
Regular airing and light refreshing is usually enough
When should you wash wool sooner?
Wash knitwear sooner if:
- There’s a visible stain
- It’s been worn directly against skin and feels sweaty
- It’s lost its softness or shape
-
You’re putting it into storage - moths are attracted to skin and food particles so washing is essential before putting knitwear away for the summer
Otherwise, washing can often wait.
The secret to washing wool less: refreshing between wears
The key to reducing washing frequency is how you care for knitwear between wears.
1. Air your knitwear after wearing
After wearing:
- Hang the garment on a wide hanger or lay it flat
- Allow it to air for a few hours (or overnight)
-
Avoid heat sources
This alone can refresh fibres dramatically.
2. Use a knitwear mist or clothing spray
A light spritz of a fabric-safe knitwear mist can:
- Neutralise odours
- Restore freshness
- Lightly scent fibres
-
Reduce the need for washing
This is especially useful for:
- Jumpers worn multiple times a week
-
Knitwear that doesn’t need full washing
3. Store knitwear with scent protection
Storing knitwear with natural scent bags or drawer liners helps:
- Keep clothes smelling fresh
- Protect fibres from moths
-
Reduce mustiness between wears
This is an often-overlooked part of knitwear care.
When it is time to wash: do it gently
When washing wool and knitwear, gentleness matters more than anything else.
Always use a wool-specific detergent
Standard detergents can be too harsh, causing:
- Fibre damage
- Loss of softness
-
Increased wear over time
A pH-balanced knitwear detergent is designed to:
- Clean without stripping fibres
- Maintain softness
-
Protect natural oils in wool
Wash at low temperatures
- 20-30°C is ideal
-
Cold or cool water helps prevent shrinkage and distortion
Avoid fabric conditioner
Fabric conditioner can:
- Coat fibres
- Reduce breathability
-
Cause build-up over time
Wool doesn’t need it when washed properly.
A seasonal rhythm for knitwear care
Rather than thinking about washing constantly, think in seasons.
During winter (active wear season)
As spring approaches
- Give knitwear a gentle wash
- Allow to dry fully
-
Store with protective scent products
This rhythm helps keep clothes fresh, protected and ready without excess effort.
The bigger picture: caring less often, but more thoughtfully
Washing wool less isn’t about neglect it’s about intentional care.
By:
- Washing less frequently
- Refreshing between wears
- Using the right products
-
Protecting fibres in storage
You:
- Extend the life of your clothes
- Reduce wear and tear
- Lower environmental impact
-
Make wardrobe care feel calmer and simpler
For many people, this shift from constant washing to thoughtful care is what transforms how they feel about their clothes.
In summary: how often should you wash knitwear?
- Every 5-10 wears, on average
- Less often if aired and refreshed properly
- Wash gently, with wool-specific products
-
Focus on between-wear care and storage
Your knitwear works hard for you. With the right rhythm of care, it can last beautifully for years and feel just as good every time you reach for it.
