Sawyer Products SP624 Permethrin, Permethrin for Dogs Insect Repellent TreatmentBrand: Sawyer Color: Milky Features: Permethrin spray bonds to fabric fibers for up to 6 weeks or through 6 washings (whichever comes first) won't stain or damage clothing, fabrics, plastics, finished surfaces, or outdoor gear; fragrance free Reduce likelihood of a tick bite by 73. 6 times by treating shoes and socks with Permethrin (University of Rhode Island study 2017); maximize protection by pairing with Sawyer Picaridin topical repellent for the