All Systems Tea Tree Oil Spray contains a high concentration of Oil of Melaleuca Alternifolia. Tea Tree Oil Spray is an all natural product which is anti-fungal, anti-bacterial, antiseptic, analgesic. Great for insect bites, hot-spots, fungus infections and all type of sores and skin conditions. All Systems Tea Tree Oil is formulated for use on dogs for many types of skin problems. It contains a natural solvent which allows it to be absorbed into the skin along with its healing properties. Contains a state-of-the-art ingredient which keeps your pet from licking it off.