The Proxpedition Moose Female 72-Hour Pheromones are designed to signal the presence of a female moose in their territory. They do not indicate that the female is in heat, only her presence, providing a strong attracting power. The scent is at its maximum at 100% during the first 36 hours and diminishes rapidly thereafter. Each set contains 2 pheromone vials, 2 activators, and 2 pads. To use, pour one vial into an activator, mix well, then pour the mixture onto a pad that you place where you want to attract game.