The cover scent has a calming effect when dispensed downwind from your stand. The scent is infused at a molecular level with a naturally occurring mineral. This 100% synthetic powder will not break down or expire, and there is no shelf life. Keeps distribution at a minimum to peak deer interest and retention. Reactivated by moisture. A few puffs of powder in a scrape and on licking branches keeps deer coming back. Each 2 oz. bottle makes 10-20 Mock Scrapes.