you can save a lot of money if you don't mind mixing
that sawyer ready to use spray is 24ounces 0.5% for 18.99 79 cents an ounce
if you get a 32 oz bottle of 13.3% 24.99 at tractor supply it makes 5.8 gallons 3.3cents an ounce at 0.5% that is considered the sever infestation dosage
any place that sells farm and vet supplies has it , chewy is even selling it now.
I have had really good luck with mixing at the 1 ounce of 13.3% permethrin to 1 gallon of water , then it makes 32 gallons of 0.1% even if you bumped that up to 2 ounces per gallon it would make 16 gallons of 0.2%
if you can mix you can save $$$$
you can also use it to treat your dog kennels , around your foundation , windows , doors , it is basically an all around insecticide.
I use a 2 gallon sprayer and make a batch a year maybe 2 if I spray around the house a few times hand all the cloths you want to treat on the line and spray , let them dry do it about once a month during the warm months and went years since I had a tick on me while wearing treated cloths. would get them all the time before
my cloths line had a tree limb fall on it and break it so I didn't do any spraying of cloths this year just around the house and wish I had treated all my hunting cloths because getting those buggers pulled from your under arm is no fun when they are dug in.
you can also soak the cloths in the solution if you don't want to invest in a sprayer but it is handy to keep it mixed up on the shelf in the garage