Choose a mosquito repellent by its registered active ingredient, label, expected exposure time, age restrictions, and application site—not fragrance or marketing rank. Common skin-applied options include DEET, picaridin, IR3535, oil of lemon eucalyptus/PMD, and 2-undecanone products. Protection varies by concentration and formulation.
Active ingredients compared
| Ingredient | Practical note | Check before use |
|---|---|---|
| DEET | Widely available in multiple concentrations | Material compatibility, age directions, and application frequency |
| Picaridin | Often low-odor and less damaging to some materials | Concentration and labeled duration |
| IR3535 | Used in skin-applied formulations | Eye irritation and product-specific duration |
| OLE/PMD | Plant-derived registered repellent active ingredient | Not the same as unformulated lemon eucalyptus oil; age restrictions apply |
| 2-undecanone | Available in selected registered products | Availability and exact label directions |
| Permethrin | For labeled clothing/gear treatment | Do not apply to skin; follow garment and product directions |
How to choose
- Estimate time outdoors, mosquito pressure, heat, sweating, swimming, and clothing coverage.
- Use the EPA registration and label to confirm age and site.
- Select enough protection without applying more often than directed.
- Apply sunscreen first when using separate products, unless labels state otherwise.
- Wash treated skin and clothing after returning indoors as directed.
Children: An adult should apply repellent to their own hands and then to the child, avoiding hands, eyes, mouth, cuts, and irritated skin. Never allow a child to handle the product. Follow age restrictions, especially for OLE/PMD products.
Application mistakes
- Spraying directly toward the face.
- Applying beneath clothing.
- Using more product because mosquitoes remain nearby.
- Assuming essential oils provide the same tested duration as registered formulations.
- Using permethrin on skin.
- Ignoring reapplication limits after swimming or sweating.
Repellent is one layer
Wear long sleeves and pants where practical, use screens, reduce standing water, choose lodging with barriers, and follow public-health advice for the destination. Repellent reduces bites; it does not reduce mosquito breeding around the property by itself.
Frequently asked questions
Does a higher DEET percentage mean stronger repelling?
Higher concentrations generally extend duration rather than making each moment dramatically “stronger.” Follow the label and match duration to the activity.
Are bracelets and stickers enough?
Do not assume they protect all exposed skin. Evaluate whether the finished product is registered and what area/duration its label supports.
Can repellent be used every day?
Use only as directed and discuss individual medical, pregnancy, or sensitivity concerns with a healthcare professional.
Application details that change protection
Apply only to exposed skin and clothing as the product label permits. Adults should apply repellent to children rather than letting children handle it; avoid hands, eyes, mouth, irritated skin, and enclosed areas. Spray onto adult hands before applying carefully to a face. Wash treated skin when protection is no longer needed and launder treated clothing according to its care instructions.
Duration claims are not guarantees. Heat, sweating, water, abrasion, application amount, and mosquito pressure can shorten protection. Reapply only at the label interval. Sunscreen and repellent have different reapplication schedules; follow both labels rather than using a combination product as a shortcut.
Build a complete mosquito plan
Personal repellent is one layer. Weekly, empty or scrub containers that hold water, maintain screens, manage gutters and covers, and use fans where practical. For travel or mosquito-borne disease risk, follow current public-health guidance for the destination. Seek local vector-control help when biting remains severe despite source reduction.
Sources
Ongoing monitoring
Choose products for the person, destination, and exposure period rather than ranking one ingredient universally. Retain the container during travel, check expiration and storage directions, and replace damaged packaging. Anyone with a prior reaction should discuss appropriate protection with a healthcare professional. Product availability, age directions, and public-health recommendations can change, so verify the current label and destination guidance before each trip.