1gallon For 1 gallon of liquid ready to soak clothes, you'll add 6.4 oz of 10% concentrate or roughly ¾ cups plus 1 tablespoons to 1 gallon of water.
6.4 oz(¾ cup plus 1 T) 10% permethrin concentrate
Clothing. You can soak socks, shirts, pants, hats, anything. I usually only soak shirts and pants.
Instructions
Spraying clothes with permethrin
Lay out some clothes outside or in a very well ventilated area. Spray the clothes according to the manufacturers directions, completely saturating them on both sides.
Hang the clothes to dry until completely dry. I keep them separate from my other clothes.
Soaking clothes with permethrin
Measuring the permethrin with a container you don't use with food, weigh out 6.4 oz of 10% concentrate and mix with 1 gallon of water in a 10 gallon bucket or similar container dedicated for the purpose of soaking your clothes. I keep my bucket in the garage, it is only used for soaking clothes with permethrin.
Using waterproof gloves, soak the clothes completely in the permethrin water, then remove to dry outside on a line to dry naturally.
When your clothes are completely dry, remove them, and keep in a place dedicated for them, like a bag, box, etc.
General info
When you'll be going outside and will be exposed to ticks, wear the outfit. You can wash it normally, but after 2-3 washes the permethrin will be gone. Without washing the permethrin may last much longer, especially if the clothes were soaked vs sprayed. I usually soak my clothes every other month, and it's likely overkill.
I also keep my outfits together, separate from my other clothes.
Some of my friends claim to have used one outfit without washing for an entire season without seeing ticks.
Every two months, re-soak the outfits, repeating the soaking and drying process. See the notes for how to dispose of permethrin.
Notes
How to Dispose of Permethrin
Permethrin should be treated as a hazardous household waste. If disposing of it makes you uneasy, remember you can always use the spray as an alternative. The first way to dispose of permethrin is to bring it to your local collection center. If you don't want to bring it in, you can leave it in a bucket and let it dry out, or cover any remaining liquid with a tight fitting lid and save for more clothes in a garage or shop.