Contains nylar the insect growth regulator which inhibits development of fleas for 3 months. Also contains the natural botanical pyrethrum which provide effective knock-down and quick-kill upon direct contact. The combination of these two ingredients kills hatching and adult fleas for 3 months. Can also be used to kill fleas in carpets, draperies, upholstery, pet bedding, floor cracks and cabinets. Directions: cover pets eyes. Do not spray directly on mouth, nose or eyes. Spray head, ears and chest until damp. With finger tips, rub into face, around mouth, nose and eyes. Then spray from neck to tail, finishing legs last. Do not use on dogs under 12 weeks of age.