Espree® Fly Spray Concentrate is an all-natural blend of gentle ingredients, including botanical oils, that repels flies, gnats and other flying insects from horses. Espress also contains organic aloe vera, coat conditioners and sunscreen to promote a healthy coat. Active ingredients are citronella oil, cedarwood oil and eucalyptus oil. Just add five parts water to one part concentrate in a clean spray container of your choice. When pest activity is high, use four parts water to one part concentrate.