Permethrin vs picaridin vs DEET: which one for ticks?
Trick question. The best answer isn't one of them — it's the way they fit together. Here's what each does, and the two-layer combination we actually wear.
- Permethrin goes on clothing and kills ticks on contact. It's not a skin repellent.
- Picaridin and DEET go on skin and repel. You pick one of these, not both.
- Best protection = permethrin on clothes + picaridin (or DEET) on skin.
- Between the two skin options, we rate picaridin 20% higher for feel, odor, and gear safety; DEET is the budget workhorse.
Search "permethrin vs DEET" and you'll find endless head-to-head comparisons that miss the point: these ingredients don't compete for the same job. One treats fabric; the others treat skin. Asking which is "best" is like asking whether a raincoat or an umbrella is better — they solve overlapping problems in different ways, and the smart move is usually to use both.
So this guide does two things: it sorts out which layer each ingredient belongs to, and then it settles the one comparison that is a real either/or — picaridin vs DEET for your skin.
Two layers, not three rivals
Think of tick protection as two surfaces to defend: your clothing and your skin.
The clothing layer — permethrin
Applied to fabric, permethrin kills ticks on contact before they reach you. Ticks climb up from grass and leaf litter, so most of them hit your treated socks and pant legs first. This is the layer that does the heavy lifting, and nothing else fills it — picaridin and DEET aren't made for clothing.
The skin layer — picaridin or DEET
For the skin permethrin can't cover — ankles, wrists, neck, hands — you want a repellent that makes you an unappealing target. Here picaridin and DEET are genuine alternatives, and you choose one.
Head to head: the real comparison
| Permethrin | Picaridin 20% | DEET 20–30% | |
|---|---|---|---|
| Goes on | Clothing & gear | Skin | Skin |
| Action | Kills on contact | Repels | Repels |
| Protection time | ~6 washes (DIY) | ~8–12 hrs | ~5–8 hrs |
| Odor | None once dry | None (unscented) | Noticeable |
| Gear-safe? | Yes (it's for fabric) | Yes | Can damage plastics & synthetics |
| Feel | n/a (on clothes) | Dry, light | Oily, heavy |
| Best for | Everyone, as the base layer | Everyday skin protection | Budget & heavy-duty use |
Picaridin vs DEET: how to choose your skin layer
This is the decision that actually matters, and it's close — both are EPA-reviewed and both stop ticks. It comes down to how they feel to live with:
Pick picaridin if…
you want all-day protection that's odorless, dries light, and won't cloud your sunglasses or eat into a synthetic jacket. It's our top-rated skin repellent for exactly these reasons, and it's an easy choice for everyday wear and around gear.
Pick DEET if…
you want the cheapest reliable option, or you're heading somewhere brutal and want the most battle-tested active there is. DEET works — it just smells stronger, feels heavier, and can damage plastics and some fabrics, so keep it off your gear.
Whichever you choose, you don't use both skin repellents at once. One skin layer, one clothing layer.
The combination we wear
For a day in tick country: permethrin-treated pants and socks, plus picaridin 20% on exposed skin. Permethrin handles the ticks climbing your clothing; picaridin covers the gaps. If we're on a tight budget, we swap in 30% DEET for the skin layer and keep it off our gear. Simple, and it's the same two-layer approach the CDC and tick researchers recommend.
Free tool How long will each last? → Our calculator turns any ingredient and concentration into a protection window and re-apply schedule.Part of our complete permethrin field guide. See also: how to apply permethrin and using it safely around cats.
Frequently asked
Is picaridin or DEET better for ticks?
Both work well and both are EPA-reviewed. We rate picaridin 20% higher for everyday use — full-day protection, no odor, dry feel, and it won't harm gear. DEET 20–30% is just as effective against ticks and cheaper, but it smells stronger and can damage plastics and synthetics.
Can I use permethrin instead of a skin repellent?
No — it's a complement, not a substitute. Permethrin treats clothing and kills on contact; picaridin and DEET treat skin and repel. Permethrin alone leaves ankles, neck, and hands exposed, so pair it with a skin repellent.
Do I need all three?
No. You need one clothing treatment (permethrin) plus one skin repellent (picaridin or DEET — not both). That's the two-layer system; the picaridin-vs-DEET choice is just personal preference.
Which is safest for kids?
Picaridin is often preferred for children for its gentleness and lack of odor; DEET is also safe when used as directed (the AAP suggests 30% or below for kids); permethrin-treated clothing is safe once dry. Follow the product label.