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Best Insect Repellent 2026: Bug Sprays That Actually Work in the Backcountry
By GearHound
I have hiked in the Alaskan tundra during mosquito season. I have camped in the Boundary Waters in June. I have been on trails in the Smokies where the gnats were so thick I could not see the blazes. After all of that, I can tell you this: the wrong bug spray is worse than no bug spray, because it gives you false confidence while the mosquitoes eat you alive.
Here is what actually works, what does not, and how to choose the right repellent for the conditions you are hiking in.
DEET vs Picaridin vs Natural
There are three main categories of insect repellent that actually work:
- DEET: The gold standard. Developed by the Army in 1946. Repels mosquitoes, ticks, flies, gnats, chiggers. Concentrations from 15% to 100%. Higher concentration = longer protection, not better protection. 25-30% DEET is the sweet spot for most hiking. 100% DEET is for extreme conditions but can damage plastics and synthetics.
- Picaridin: A synthetic repellent that is as effective as DEET against mosquitoes and ticks but does not dissolve plastic, rubber, or synthetic fabrics. Odorless, non-greasy, and feels nicer on skin. 20% picaridin provides up to 12 hours of protection. My personal preference for most trips.
- Oil of lemon eucalyptus (OLE): The only plant-based repellent recommended by the CDC. Works reasonably well against mosquitoes but not as well against ticks. Shorter protection time (2-4 hours). If you want a natural option, this is the one. Other “natural” repellents (citronella, lemongrass, peppermint) do not work well enough to rely on in the backcountry.
What to Look For
- Active ingredient: DEET (15-30% for most use, up to 100% for extreme conditions) or picaridin (20%). Skip anything else if you are in serious bug country.
- Protection time: Check the label. 25% DEET gives about 6 hours. 20% picaridin gives 8-12 hours. Reapply as needed — sweating and swimming reduce effectiveness.
- Application type: Pump spray is best for hiking — aerosols are bulky and can fail at altitude. Lotion is the most precise (no overspray) but slower to apply.
- Skin vs clothing: DEET and picaridin go on skin. Permethrin goes on clothing and gear only — never on skin. Permethrin-treated clothing is a powerful complement to skin repellent.
- Plastic safety: DEET dissolves some plastics, including watch crystals, sunglasses coatings, and tent fabric. Picaridin does not. If you wear glasses or use a synthetic tent, picaridin is safer.
The Best Insect Repellent for Most Hikers
Sawyer 20% Picaridin Lotion
This is what I use for most trips. Picaridin is as effective as DEET against mosquitoes and ticks, but it does not melt my sunglasses, watch, or tent fabric. The 20% concentration gives up to 12 hours of protection — enough for a full day of hiking without reapplying.
The lotion version is better than the spray for two reasons: no overspray (so you do not waste product or inhale it) and more even coverage. A 4-ounce bottle lasts for many applications because a little goes a long way. It is odorless and non-greasy — you barely notice you are wearing it.
If I could only carry one insect repellent, this is it.
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The Best for Extreme Bug Conditions
Repel 100 Insect Repellent (98% DEET)
When the bugs are so bad you can hear them, 98% DEET is the nuclear option. It provides up to 10 hours of protection against mosquitoes, ticks, gnats, and biting flies in the worst conditions — Alaska in July, the Everglades, boreal forest in peak season.
The downside: at 98% DEET, this stuff melts plastic. It will fog your watch crystal, damage the coating on sunglasses, and degrade synthetic tent fabric if you get it on them. Apply it carefully — avoid your hands if you are going to touch gear, and do not get it near your eyes or mouth.
For most hiking, 98% DEET is overkill. But if you are going somewhere where the bugs are genuinely unbearable, nothing else works as well.
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The Best for Clothing and Gear
Sawyer Permethrin Insect Repellent
Permethrin is not a skin repellent — it is a treatment for clothing, tents, and gear. You spray it on your clothes (or soak them in it), let it dry, and it repels and kills mosquitoes, ticks, and other insects on contact for up to 6 weeks or 6 washings.
Treating your clothes with permethrin is the single most effective thing you can do for tick prevention. Ticks crawl up from the ground — if they hit permethrin-treated pants, they die or fall off before reaching your skin. In tick-heavy areas, this is more important than any skin repellent.
The catch: permethrin is toxic to cats while wet (safe once dry) and to aquatic life. Apply it outdoors, away from water, and let clothes dry completely before wearing them around pets.
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The Best Everyday Bug Spray
OFF! Deep Woods (25% DEET)
The OFF! Deep Woods is the bug spray you see at every grocery store and gas station. It works. 25% DEET gives about 6 hours of protection against mosquitoes, ticks, biting flies, gnats, and chiggers. It is the right concentration for most hiking — strong enough to work, not so strong that it melts your gear.
The aerosol version is convenient but bulky for backpacking. The pump spray is better for carrying in a pack. The scent is noticeable but not overwhelming. For day hikes, car camping, or keeping in a daypack, this is the easiest option to find and use.
The Best Value
Coleman 25% DEET Twin Pack
Two 6-ounce cans of 25% DEET spray for less than the price of one Sawyer bottle. The concentration is the same as OFF Deep Woods, so the protection is the same — about 6 hours per application. Coleman makes reliable, no-frills outdoor products, and this bug spray is no different.
These are aerosol cans, so they are better for car camping than backpacking (aerosols are bulky and some airlines will not let you fly with them). But for keeping in the car, the camper, or the daypack, the twin pack is the best value in bug spray.
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How to Apply Insect Repellent Properly
Most people spray bug repellent like cologne — a few squirts and done. That is not enough. Here is how to do it right:
- Apply to all exposed skin. Mosquitoes will find the one spot you missed. Ears, neck, wrists, ankles — get everything.
- Use enough. A thin, even coating works. For lotion, that means rubbing it in like sunscreen. For spray, that means covering the area until it glistens slightly.
- Apply before you need it. Repellent works better as a barrier than as a reaction. Put it on before you enter bug country, not after you are already getting bitten.
- Reapply after swimming or heavy sweating. Even “water-resistant” formulas lose effectiveness when you sweat heavily or go in the water.
- Wash it off at the end of the day. DEET and picaridin are safe for skin during the day, but you should wash them off before sleeping. Use camp soap and water.
What I Recommend
For most hiking: Sawyer 20% Picaridin on skin + Sawyer Permethrin on clothes. This combo is what I use in tick country. For extreme bugs: Repel 100 when nothing else is strong enough. For everyday use: OFF Deep Woods — easy to find, works fine.
Do not mess around with bugs. Lyme disease, West Nile, and tick-borne illnesses are real. Carry repellent, use it properly, and check yourself for ticks at the end of every hiking day.
For more trail gear, see our guides to hiking compasses, travel towels, and emergency blankets.
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