MouseAway uses rodent's exceptional sense of smell against them! This rodent repellent is for people that wish to avoid poisons, which can easily harm children or family pets, as well as traps, which are cruel and messy . This all natural product consists of a special blend of essential oils contained in a versatile muslin bag. These non-toxic oils, while not offensive to humans , are very irritating to pests like mice and rats and immediately repel them.