Do Clothes Moths Eat Cotton
If you've discovered small holes in a cotton T-shirt, shirt or other garment, you might immediately suspect clothes moths.
But do clothes moths actually eat cotton?
The answer is more interesting than a simple yes or no. Clothes moth larvae are primarily associated with animal-derived fibres and materials such as wool, hair, fur and feathers. Pure cotton is a plant-based fibre and is not the type of keratin-rich material clothes moth larvae normally seek as their main food source.
However, cotton garments can still be found damaged in homes with clothes moths — particularly where fabrics are blended, soiled, stored alongside susceptible materials or affected by larval activity around nearby feeding sites.
This guide explains what clothes moths actually eat, why you might find holes in cotton clothing and which materials you should inspect if you suspect an infestation.
Do Clothes Moths Eat Cotton?
Pure cotton is not a preferred food material for clothes moth larvae.
Clothes moth larvae are adapted to feed primarily on materials containing animal proteins such as keratin. This is why wool, hair, fur and feathers are particularly vulnerable.
Cotton, by contrast, is a plant-derived cellulose fibre.
So if you discover holes in a garment labelled cotton, don't automatically assume the larvae have been feeding on the cotton itself.
Check the garment composition, staining, construction and surrounding materials — and look for physical evidence of clothes moth activity.
What Do Clothes Moths Actually Eat?
The important pest stage is the larva, not the small adult moth flying around your room.
Clothes moth larvae can feed on susceptible animal-derived materials, including:
🧶 Wool
Wool clothing, carpets, rugs, blankets and upholstery can provide excellent feeding material for clothes moth larvae.
🧥 Cashmere
Cashmere is an animal fibre and can be particularly vulnerable when stored undisturbed.
🪶 Feathers
Feather-filled furnishings and other feather materials can provide suitable animal-derived material.
🐑 Hair & Fur
Animal hair, fur and accumulated hair or lint containing suitable material can support larval feeding.
🧣 Silk
Silk is an animal-derived protein fibre and may be vulnerable to textile pests.
🛋️ Traditional Furnishings
Older furniture can contain wool, hair, feathers, felt and other susceptible materials hidden beneath the visible outer fabric.
If you're unsure what insect you have found, see our guide to how to identify clothes moths .
Why Might a Cotton Garment Have Holes During a Clothes Moth Infestation?
There are several possibilities.
1. The Garment May Not Be 100% Cotton
Check the care label carefully.
A garment that looks and feels predominantly like cotton may contain another fibre as part of a blend, trim, lining or construction.
This is particularly relevant with:
- knitwear;
- socks;
- jackets and coats;
- blankets;
- upholstery fabrics;
- lined garments; and
- mixed-fibre textiles.
If an animal-derived fibre is present, clothes moth larvae may have access to a suitable food source even though cotton makes up much of the visible fabric.
2. The Cotton May Be Soiled or Contaminated
Real household textiles are not laboratory samples.
Worn garments can contain perspiration, skin debris, food residues, hair and other organic material.
That does not mean cotton suddenly becomes equivalent to wool as a clothes moth food source.
It does mean that the simple statement “moths can never be associated with cotton” is too absolute when dealing with real clothing and household infestations.
3. The Damage May Be Associated With Nearby Feeding Activity
A cotton item may be stored immediately beside wool, cashmere, fur, feathers or another susceptible material.
Larvae moving through or sheltering around mixed textiles can make the source of a hole difficult to establish from the garment alone.
The correct response is to inspect the entire storage area rather than concentrating only on the damaged cotton item.
4. The Hole May Not Have Been Caused by Clothes Moths
This is easy to overlook.
Small holes can also result from:
- ordinary wear;
- friction;
- snagging;
- washing-machine damage;
- chemical damage;
- weak or deteriorating fabric;
- other textile pests; or
- manufacturing defects.
A hole in clothing is therefore not proof of a clothes moth infestation.
Do Clothes Moths Eat Dirty Cotton?
This question is often answered too simplistically.
Pure cotton itself remains a plant-derived cellulose fibre rather than the keratin-rich animal material most strongly associated with clothes moth larval feeding.
However, worn or soiled textiles can contain additional organic material such as perspiration, skin debris, food residues and hair.
That is one reason it is sensible to clean susceptible clothing before long-term storage.
But finding damage to dirty cotton still does not prove that the cotton fibre itself was the primary food source.
Do Adult Clothes Moths Eat Clothes?
No — the larval stage causes textile damage.
Adult clothes moths are the reproductive stage that people are most likely to notice moving around a home.
The larvae are responsible for feeding on susceptible textile materials.
This distinction matters because killing the adult moths you happen to see does not necessarily remove eggs or larvae hidden elsewhere.
Learn more about the clothes moth life cycle .
Which Fabrics Can Clothes Moths Damage?
| Material | Typical Risk | Why |
|---|---|---|
| Wool | High | Animal-derived protein fibre and a classic clothes moth larval food source. |
| Cashmere | High | Animal-derived fibre and highly vulnerable when stored undisturbed. |
| Fur / animal hair | High | Provides suitable animal-derived material for larvae. |
| Feathers | High | Can provide suitable protein material. |
| Silk | Potentially vulnerable | Silk is an animal-derived protein fibre. |
| Cotton | Lower as a primary food source | Plant-derived cellulose rather than the keratin-rich material typically targeted by clothes moth larvae. |
| Polyester | Low as a primary food source | Synthetic fibre does not provide the same animal-derived food material. |
| Nylon / acrylic | Low as a primary food source | Synthetic fibres are not the typical nutritional target, although blended or contaminated materials complicate real-world damage. |
| Mixed fabrics | Depends on composition | A textile containing wool or another susceptible animal-derived fibre can be affected even when much of the material is cotton or synthetic. |
Do Clothes Moths Eat Polyester?
Polyester is synthetic and is not a typical primary food source for clothes moth larvae.
However, a garment labelled as a polyester blend may contain wool or another susceptible fibre.
So again, check the complete composition rather than relying on the appearance of the garment.
Do Clothes Moths Eat Silk?
Silk differs from cotton because it is an animal-derived protein fibre.
Silk items can therefore be vulnerable to textile pests and should be checked carefully where clothes moth activity is confirmed.
Particular care should be taken with valuable or delicate garments because treatment methods suitable for one textile may not be appropriate for another.
Do Clothes Moths Eat Wool?
Yes. Wool is one of the most important materials to inspect when clothes moths are suspected.
Don't restrict the inspection to wool clothing.
Check:
- wool carpets;
- rugs;
- blankets;
- stored knitwear;
- coats and suits;
- felt materials;
- upholstery containing wool or animal hair; and
- areas underneath furniture where wool carpet remains undisturbed.
Can Clothes Moths Damage Cotton Carpets?
The same principles apply to carpets.
If a carpet is genuinely made entirely from plant-derived or synthetic fibre, the carpet fibre itself is not the classic food material associated with clothes moth larvae.
But carpet construction can be more complicated than the visible pile.
Backing, underlay, accumulated animal hair, lint, mixed fibres and nearby susceptible materials should all be considered.
If you find larvae around a carpet edge, identify both the insect and the materials present before deciding what is being eaten.
Can Clothes Moths Damage Furniture?
Yes, where furniture contains suitable materials.
The visible covering doesn't always tell you what is inside a piece of furniture.
Traditional or upholstered furniture can contain:
- wool;
- animal hair;
- felt;
- feathers;
- natural padding; and
- other susceptible materials.
We cover this in detail in Can Clothes Moths Damage Furniture?
How Can You Tell If Clothes Moths Caused the Holes?
Don't rely on the shape of the hole alone.
Instead, inspect the surrounding area for additional evidence.
Look for:
- small cream-coloured larvae;
- silken webbing or tubes;
- portable larval cases where case-bearing clothes moths are involved;
- cast larval material;
- adult clothes moths;
- damage to wool or other susceptible materials nearby; and
- activity around carpet edges, wardrobes and undisturbed areas.
Finding several of these signs provides much stronger evidence than finding a hole in one cotton T-shirt.
Where Should You Look for Clothes Moths?
Clothes moth larvae generally favour sheltered areas where suitable material is available and disturbance is limited.
Inspect:
👕 Wardrobes
Check folds, shelves, corners and natural-fibre garments that have not been moved recently.
🧶 Carpet Edges
Inspect around skirting boards and beneath furniture, particularly where the carpet contains wool.
🛏️ Under Beds
Quiet areas can accumulate hair, lint and susceptible stored materials.
🛋️ Furniture
Check beneath and behind upholstered furniture and around concealed natural materials.
📦 Storage
Inspect boxes, bags and containers holding woollens, blankets and seasonal clothing.
🧥 Rarely Worn Clothes
Coats, suits, cashmere and wool garments left undisturbed deserve particular attention.
Does a Hole in Cotton Mean You Have a Serious Infestation?
No.
A damaged cotton item cannot tell you the size or age of a clothes moth infestation.
It may not even have been damaged by clothes moths.
The extent of an infestation is better judged from:
- the number of affected areas;
- larval activity;
- damage to susceptible materials;
- adult moth monitoring;
- the number of rooms involved; and
- whether activity continues over time.
What Should You Do If You Suspect Clothes Moths?
Confirm the Pest
Try to identify an adult moth, larva or larval case rather than diagnosing the problem solely from holes in clothing.
Check the Fabric Labels
Identify wool, cashmere, silk and mixed fibres among the affected and nearby items.
Inspect Beyond the Wardrobe
Check wool carpets, rugs, furniture, carpet edges and other undisturbed locations.
Vacuum Thoroughly
Vacuum appropriate carpet edges, floors, cracks and areas beneath furniture to physically remove accessible larvae, debris and material on which they may feed.
Treat Suitable Clothing
Launder, heat-dry or otherwise treat suitable items according to their care instructions. Delicate and valuable textiles may require specialist care.
Monitor Activity
Clothes moth pheromone traps can help detect and monitor adult male moth activity but should not be relied upon as the only treatment for an established infestation.
Read our guide to what clothes moth pheromone traps do .
Do Cedar Blocks Protect Cotton and Other Clothes?
Cedar and other natural repellents are often sold for wardrobe protection.
They should not be relied upon to eliminate an established clothes moth infestation involving hidden larvae and eggs.
If you'd like to understand their limitations, see our guide to essential oils and natural moth remedies .
When Is Professional Clothes Moth Treatment Worth Considering?
Professional treatment becomes more useful when:
- larvae are established in carpets or furniture;
- several rooms are affected;
- valuable textiles are at risk;
- activity continues despite thorough DIY measures;
- you cannot identify the main harbourages; or
- the infestation is too extensive to treat item by item.
The appropriate treatment can depend on the materials involved, distribution of the infestation and property.
Clothes Moth Heat Treatment
Professional heat treatment can be useful for established clothes moth infestations because eggs, larvae, pupae and adults are vulnerable to sufficiently high temperatures when effective thermal conditions reach them for sufficient exposure.
MothKill uses professional heating equipment, industrial air-moving fans and multiple temperature sensors to create and monitor the treatment environment.
Our indirect diesel heating equipment remains outside the property. Combustion gases remain outdoors while clean heated air is ducted into the treatment area.
Heat treatment still requires careful preparation. Some belongings and materials can be heat-sensitive and may need to be removed or protected before treatment.
Learn more about professional clothes moth heat treatment .
How Can You Protect Clothes From Moths?
Useful prevention measures include:
- vacuuming carpet edges and beneath furniture regularly;
- cleaning susceptible clothing before long-term storage;
- inspecting wool, cashmere and other vulnerable items periodically;
- avoiding leaving susceptible textiles undisturbed indefinitely;
- checking second-hand natural-fibre textiles before storage;
- using suitable sealed storage for clean seasonal garments; and
- monitoring previously affected areas.
Remember that prevention should not focus only on wardrobes. Wool carpets, rugs and furnishings can also support an infestation.
Do Clothes Moths Eat Cotton? FAQs
Do clothes moths eat cotton clothes?
Pure cotton is not a preferred primary food material for clothes moth larvae. They are primarily associated with animal-derived materials such as wool, hair, fur and feathers. If a cotton garment is damaged, check its complete fibre composition and inspect nearby materials for evidence of textile pests.
Why are there holes in my cotton T-shirts?
There are many possible causes, including normal wear, snagging, washing damage, mixed fibres and textile pests. Holes alone cannot confirm clothes moths.
Do clothes moths eat dirty cotton?
Cotton remains a plant-derived fibre, but worn textiles can contain perspiration, skin debris, food residues, hair and other organic material. Cleaning clothing before long-term storage is sensible, but damage to a soiled cotton item does not prove the cotton fibre itself was the primary food source.
Do clothes moths eat polyester?
Polyester is synthetic and is not a typical primary food source for clothes moth larvae. However, mixed fabrics can contain susceptible animal-derived fibres.
Do clothes moths eat silk?
Silk is an animal-derived protein fibre and can be vulnerable to textile pests. Delicate silk items should be treated carefully using methods suitable for the particular garment.
Do clothes moths eat wool?
Yes. Wool is one of the main materials associated with clothes moth larval feeding. Check wool clothing, carpets, rugs, blankets and furnishings if an infestation is suspected.
Do adult clothes moths eat clothing?
No. The larvae cause textile damage. Adult moths are the reproductive stage, which is why simply killing flying moths does not necessarily eliminate an infestation.
Does one hole mean I have clothes moths?
No. Clothing can develop holes for many reasons. Look for additional evidence such as larvae, webbing or cases, adult clothes moths and damage to susceptible materials.
Can clothes moths live in carpets?
Yes, particularly where carpets contain wool or other suitable animal-derived materials. Activity is often found around edges and beneath furniture where there is less disturbance.
The Bottom Line: Do Clothes Moths Eat Cotton?
Pure cotton is not the preferred keratin-rich food material associated with clothes moth larvae.
Wool, animal hair, fur, feathers and other animal-derived materials are much more important food sources.
But finding holes in cotton does not automatically rule clothes moths in or out.
The garment could contain mixed fibres, additional organic material may be present, nearby susceptible textiles may be supporting larvae, or the damage could have an entirely different cause.
Instead of diagnosing an infestation from one hole, look for the insect and inspect the surrounding materials.
If clothes moths are confirmed, identify the full extent of the infestation before deciding how to treat it.
Found Clothes Moths or Larvae?
If you're finding larvae, adult moths or continuing textile damage, MothKill can advise on treatment options for clothes moth infestations, including professional heat treatment.
