Why We Love This Protect your horse from mosquitos and other annoying insects with Mosquito Halt. Contains two insecticides and two repellents for use on horses for residual control of mosquitoes, gnats, face flies, stable flies, house flies, mites, chiggers, and lice. Favorite Features Kills and repels mosquitoes as well as gnats, face flies, stable flies, house flies, mites, chiggers, and lice Active ingredients include Permethrin for quick knock down and residual control Includes sunscreen for protection against harmful UV rays Superior spray bottle is leak proof with an easy to hand, ergonomic design