Can mosquitoes bite through clothes? Yes, they can. The CDC says so in plain words on its travel page: "Mosquitoes may bite through thin clothing." That one sentence explains a lot of the bites people swear they got while fully dressed, the ones on the back of a thigh through leggings, or along a shoulder under a cotton tee. This guide sets out what the CDC, the NHS and the US Environmental Protection Agency (EPA) actually say about clothing and mosquito bites, what a recent laboratory study found about fabric, and why even good clothing still leaves a job for repellent on the skin you cannot cover.
So, can mosquitoes bite through clothes?
The short answer from the official sources is that clothing is a barrier, but only as good as the fabric. The CDC's guidance for travellers tells you to pack loose-fitting, long-sleeved shirts and pants, and then adds the warning about thin material (CDC, Preventing Mosquito Bites While Traveling, page dated 21 November 2024). Its main prevention page repeats the clothing advice in the same words: wear loose-fitting, long-sleeved shirts and pants (CDC, Preventing Mosquito Bites, page dated 28 August 2024).
The CDC's pages do not explain the reasoning behind "loose-fitting", and they do not compare tight and loose cuts head to head, so it would be unfair to claim more than they do. What they give you is a practical rule: cover the skin, and do not trust thin cloth to do the work by itself.
To see why thin cloth is a weak point, it helps to remember how a mosquito feeds. The CDC describes it as piercing the skin with a special mouthpart, the proboscis, to suck up blood (CDC, About Mosquito Bites, page dated 21 June 2024). The proboscis is fine enough that an open weave, or a stretched fabric with little between the weave and your skin, may not stop it. Whether a given fabric does depends on how it is built, which is where the research comes in.
What the fabric research found
Two peer-reviewed studies are useful here, and both come from the same idea: that bite resistance is a property of the cloth itself, not of any chemical on it.
A 2021 paper in Insects built a mathematical model of fabric barriers that resist bites from Aedes aegypti mosquitoes, based on the physical structure of the textile and no insecticide. The authors derived it from mosquito measurements and an analysis of biting behaviour, validated it on woven and knitted fabrics, and then developed prototype garments that prevented biting (Luan et al., Insects 2021).
A 2026 study in the Journal of Medical Entomology tested 88 commercially available fabrics in mouse blood-feeding and behavioural bioassays with Aedes, Anopheles and Culex mosquitoes. Of the 88, 53 were blood-feed-proof. Those fabrics were more likely to have a higher areal weight density and a polyurethane coating than the fabrics that mosquitoes could feed through. Five of the six most comfortable fabrics, judged by hand-feel, were definitively bite-proof (Hill et al., J Med Entomol 2026).
Take two practical points from that, with the caveat that these were laboratory tests and the authors were looking for materials for future garments, not reviewing what is in your wardrobe. First, fabric weight and construction matter: 35 of the 88 fabrics in that sample let blood-feeding through. Second, "bite-proof" is possible without repellent or insecticide, but it is not something you can judge by eye in a shop. Until such fabrics are labelled clearly, the CDC's wording, thin clothing is not safe, is the sensible default.
What the NHS and CDC say to wear
The UK and US advice lines up closely. The NHS, writing about malaria prevention for people travelling to affected regions, tells you to wear long-sleeved clothing and trousers to cover your arms and legs in the evening, when mosquitoes are most active (NHS, Malaria, page last reviewed 29 July 2025). The CDC says loose-fitting, long-sleeved shirts and long pants.
Put together, a sensible outfit for a mosquito-heavy evening looks like this:
- Long sleeves and long trousers, as the NHS and CDC both advise.
- Fabric that is not thin or sheer, given the CDC's warning about thin clothing.
- A loose cut, as the CDC recommends, rather than something stretched tight against the skin.
- Socks and closed shoes if you are sitting somewhere low to the ground, because ankles are exposed even when the rest of you is covered. (That one is common sense, not a quote from either agency.)
The wider guide to cutting down bites in warm, damp weather is in our piece on how to prevent mosquito bites in humid weather, which pairs clothing with timing and water around the house.
Permethrin-treated clothing, in one paragraph
You will see treated clothing mentioned whenever this topic comes up. The CDC describes permethrin as an insecticide that kills or repels mosquitoes, says treated clothing and gear can be bought pre-treated or treated yourself with 0.5% permethrin, and says factory-treated items stay protective through multiple washings, with the label stating how long. It also says plainly not to use permethrin products directly on skin (CDC, About Permethrin-Treated Clothing and Gear, page dated 14 May 2024). The EPA adds that when you wear factory-treated clothing, only the skin covered by it is protected from the pests on the label, and that other exposed skin needs a repellent labelled for human skin (EPA, Repellent-Treated Clothing, last updated 26 February 2026). That last point is the bridge to the next section.
The skin you cannot cover still needs a plan
Clothing leaves your hands, neck, face and often your ankles bare, and those are the places mosquitoes land. The EPA's advice for repellents is to apply them only to exposed skin and/or clothing, and not under clothing (EPA, Using Insect Repellents Safely and Effectively, last updated 10 November 2025). So the two layers work as a pair: clothing covers what it can, and a repellent goes on what it cannot.
The CDC lists the active ingredients in EPA-registered repellents as DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE), para-menthane-diol (PMD) and 2-undecanone, and says to follow the label and reapply as directed. The CDC also says that if you use sunscreen, you apply it first and repellent second, and that OLE or PMD products should not be used on children under 3 (CDC, Preventing Mosquito Bites, as above). The NHS, for high-risk malaria areas, specifically says to use a repellent that is 50% DEET-based on the skin. For the order of products and the face, see our guides to sunscreen and insect repellent order and using insect repellent on your face.
One more EPA point is worth repeating, because it surprises people who like to cover up: repellent does not go under clothing. If your sleeves are long, put repellent on the hands and neck, not on the arm beneath the sleeve.
Where Misaj fits
Misaj, a Paris based skincare brand, makes Glow Protect. Its Glow Protect product page says it combines "hydration, skin barrier support and botanical mosquito protection in a single cream designed to be worn daily." That is a statement about a cream you wear on skin. The page says nothing about clothing, so nothing in this article suggests Glow Protect works on, or through, fabric. It is not a substitute for the covering-up advice above, and it does not change how you should use a permethrin-treated garment.
The takeaway
Mosquitoes can bite through thin clothing, and the official advice is the same on both sides of the Atlantic: cover your arms and legs with loose, long clothing, avoid thin fabric, and put repellent on the skin that stays exposed. Permethrin is a clothing and gear option only, never something for skin. For the broader list of what bites in the UK and when, see our UK biting insects field guide.
Frequently asked questions
Can mosquitoes bite through jeans?
The CDC does not single out jeans. It says mosquitoes may bite through thin clothing and recommends loose-fitting, long-sleeved shirts and pants. Heavier, tightly woven fabrics are more likely to resist than thin or stretched ones, though the 2026 laboratory study tested fabric types in a controlled setting, not specific garments.
Can mosquitoes bite through leggings or tight clothes?
The CDC's advice is to wear loose-fitting clothing and warns about thin material. Leggings are often thin, so they fall on the cautious side of that advice. The CDC pages do not give a tight versus loose comparison, so read this as a cautious reading of its guidance.
Does long-sleeved clothing stop mosquito bites?
It helps. The NHS and CDC both recommend long sleeves and long trousers, and the NHS says to wear them in the evening when mosquitoes are most active. The fabric still matters.
Do I need repellent if I am fully covered?
The EPA says to apply repellent to exposed skin and/or clothing, so any skin you leave uncovered, such as hands, neck, face or ankles, is where it goes. Repellent should not be applied under clothing.
Is permethrin safe to put on skin?
No. The CDC says not to use permethrin products directly on skin. It is for clothing and gear. The EPA says factory-treated clothing protects only the skin it covers.
What is the best colour to wear to avoid mosquitoes?
The sources fetched for this guide do not make a colour recommendation, so we have not made one. The CDC and NHS advice is about coverage and fabric.
Sources
Fetched 2026-10-26.
- CDC, Preventing Mosquito Bites While Traveling, page dated 21 November 2024 ("Mosquitoes may bite through thin clothing"; loose-fitting, long-sleeved shirts and pants). https://www.cdc.gov/mosquitoes/prevention/preventing-mosquito-bites-while-traveling.html
- CDC, Preventing Mosquito Bites, page dated 28 August 2024 (clothing, registered repellent ingredients, sunscreen order, children and OLE/PMD). https://www.cdc.gov/mosquitoes/prevention/index.html
- CDC, About Mosquito Bites, page dated 21 June 2024 (proboscis). https://www.cdc.gov/mosquitoes/about/about-mosquito-bites.html
- CDC, About Permethrin-Treated Clothing and Gear, page dated 14 May 2024. https://www.cdc.gov/mosquitoes/prevention/about-permethrin-treated-clothing-and-gear.html
- NHS, Malaria, page last reviewed 29 July 2025 (long sleeves in the evening; 50% DEET). https://www.nhs.uk/conditions/malaria/prevention/
- EPA, Repellent-Treated Clothing, last updated 26 February 2026. https://www.epa.gov/insect-repellents/repellent-treated-clothing
- EPA, Using Insect Repellents Safely and Effectively, last updated 10 November 2025. https://www.epa.gov/insect-repellents/using-insect-repellents-safely-and-effectively
- Luan K et al., Mosquito-Textile Physics: A Mathematical Roadmap to Insecticide-Free, Bite-Proof Clothing for Everyday Life, Insects, 13 July 2021, PMID 34357296 (abstract read via Europe PMC). https://europepmc.org/article/MED/34357296
- Hill E et al., Toward comfortable mosquito-proof clothing, Journal of Medical Entomology, 2026, PMID 41144297 (abstract read via Europe PMC). https://europepmc.org/article/MED/41144297
- misajskin.com, Glow Protect product page (brand wording quoted verbatim, checked 2026-10-26). https://misajskin.com/products/glow-protect
CDC pages returned HTTP 403 to curl this run and were read through a fetch tool. The NHS page and the EPA pages were fetched directly. The CDC pages carry a single date, which is quoted as given.