This gallon jug is a refill formulated to top off empty trigger-spray bottles used for topical fly and insect control on horses. The water-based liquid combines four active ingredients, including a pyrethroid and botanically derived pyrethrins, to deliver fast knockdown along with residual repellency. A built-in conditioner helps the formula bind to the hair shaft so it continues working even when a horse sweats or gets wet, and the product also contains a sunscreen component. Application can be made as a full-body spray or, for the face, as a wipe using a clean absorbent cloth or sponge. Horses should be brushed to remove loose dirt and allowed to dry completely if washed before the product is applied. The container is intended for single use and is not designed to be refilled once emptied.