Permethrin is first line of defense for the outdoor enthusiast against bugs. No matter what you’re doing outdoors, you should always apply permethrin to your clothing and gear before heading out to act as the primary insect repellent. Our special insect repellent formula is the only odorless and invisible permethrin insect repellent, and it’s the longest-lasting on the market, lasting up to 42 days of outdoor exposure or through six washings with only one application. Permethrin repels and kills mosquitoes, ticks, chiggers, biting flies, and over 55 other kinds of insects. Sawyer’s permethrin insect repellent follows you as you’re moving, unlike stationary repellants that need to saturate the air they’re in before they start working. While it isn’t harmful to your skin, it isn’t effective on skin, so only use it on your clothes and gear.