Sawyer Permethrin Spray Review (2026)

Name: Sawyer Permethrin Insect Repellent Spray
Brand: Sawyer

Sawyer Permethrin bonds to fabric fibers on contact and remains effective through 6 machine washes. Applied to clothing, it kills mosquitoes, ticks, and chiggers on contact — unlike DEET which only repels, permethrin kills. The combination of skin DEET and clothing permethrin provides 98%+ protection against tick attachment.

The short version

Sawyer Permethrin is the fabric insect repellent that kills ticks on contact. We looked at how standalone permethrin compares to a combined permethrin + DEET strategy for Lyme disease prevention.

Who it's for

Buy this if: Anyone hiking in tick-endemic areas (Northeast US, upper Midwest, Pacific Coast).

Skip this if: Desert hikers in tick-free terrain — permethrin costs $15 per treatment and is unnecessary without tick risk.

In practice

Combined Strategy

Permethrin on clothing + DEET on skin = 98.8% tick attachment prevention (CDC study). Permethrin alone: 73%. DEET alone: 87%. The combination is the standard CDC recommendation for Lyme-endemic areas. Treating your hiking clothes once lasts a week — the least time-consuming effective tick prevention available.

What we loved

+ Kills ticks on fabric contact — superior to DEET which only repels+ 6-wash durability — one treatment per week-long trip+ Safe on all fabric types except leather and synthetic rainwear coatings

What we'd change

– Toxic to cats until dried — keep treated clothing away from cats for 24 hours after application– Cannot apply to skin — clothing treatment only

Where to buy

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Common questions

How do I apply it?

Hang treated garments outside in still air, spray until damp, allow 2-4 hours drying time before wearing.

Can I treat my tent?

Yes — treat tent exterior to kill ticks that climb the tent wall overnight.

Methodology: Our gear ratings combine manufacturer specifications with aggregated owner feedback and long-term durability reports from verified buyers. We weigh value, packability, durability, and real-world reliability. Ratings are never influenced by commission rates. Last verified 2026-07-03.

Affiliate disclosure: This review contains Amazon affiliate links. If you buy through them, Gear Made Simple earns a small commission at no extra cost to you.

Who it's for

In practice

Combined Strategy

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Common questions

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