Amazon has the Repel Permethrin Clothing & Gear Insect Repellent Aerosol, 6.5-Ounce for just $2.78.
Add on item (ships with $25+ orders) or ships with Alexa. https://www.amazon.com/Repel-Perm...B00AA8WX52 - expired, see FP post for other options
Odorless permethrin insecticide
Binds to the fabric being treated and kills insects that come in contact with it
Provides up to 2 weeks of protection
For clothing and gear only (not to be applied to skin)
Slick deal is buying the "case pack of 1" for $2.78.