Lethal is a human scent eliminator that was developed by chemists with over 30 years in commercial odor elimination to be the most effective personal scent elimination product on the market. The field spray contains a special activator that charges the product with odor eliminating bonding agents, greatly increasing the effectiveness of the scent eliminators. Since you activate the product yourself, you know that you also have one of the freshest scent eliminators available. The activators last for about 90 days which allows you to get through an entire hunting season. Each unit comes with a 23 fl oz spray bottle and a 1 oz activator packet.