Grave Digger Doe Estrous' scent stays strong regardless of weather conditions and is specifically designed to resist moisture and freezing. This powerful comination is packaged in a heavy-duty bag with an airtight seal, locking in freshness. Once opened, the TRS (Time Released Scent) fills the woods with the enticing sent of a hot doe that lasts up to 30 days. This eliminates the need to re-visit scrape sites, thus preventing contamination by human odor.