Natural Chemistry's Natural Flea & Tick Shampoo and Spray combines all natural botanical ingredients that work synergistically with one another to provide effective, 100% natural & safe, flea & tick protection. Natural Chemistry's Natural Flea & Tick formulas have been proven to provide residual killing and repelling of fleas, ticks, black flies and mosquitoes for up to 7 days. With Natural Chemistry's Natural Flea & Tick Shampoos, Sprays and Yard & Kennel Spray; your pet and home are protected with a natural Triple Threat" Flea Free" Solution."