The First Defense® Inert formulation provides the same functionality and targeting properties as active product duplicating the delivery system for training purposes. The MK-9 features an easy to use trigger handle and is intended for use in crowd management and will deliver 14 short bursts at an effective range of 18-20 ft.  This inert aerosol product utilizes a cone/fogger delivery method providing a wide spray pattern for easier target acquisition.Eye protection should be worn during any force on force training, even though this formula is eye safe.