De Flea RTU Cat & kitten Shampoo is a deep cleaning shampoo that incorporates a patented combination of non-toxic, safe ingredients that work in tandem with one another to soften" the waxy exoskeleton of fleas ticks lice mites and other insects. Once the insect"s "armor" has been penetrated its internal organs are saturated and the insect is immediately destroyed. De Flea Shampoo works against all life stages of an insect and quickly and effectively eliminates all parasitic insects from the animal and its environment - without the use of chemical or toxic ingredients. De Flea does not affect the "host" and parasites can not become resistant or immune - no "ghost" fleas. De Flea is safe to use in conjunction with "spot-on" flea and tick protection."