In game units where natural cervid urine is no longer in use, Code Blue Synthetic Doe Estrous is the logical deer attractant to use. Code Blue Synthetic Doe Estrous has been scientifically formulated to replicate the arousing smell of natural doe estrous urine that drives bucks wild. Unlike real urine however, synthetic deer urine does not breakdown and become ineffective with age. Use synthetic doe estrous with mock scrapes, active scrapes, scent drags, or scent wicks. Recommended to use mid to late hunting season. Does not contain deer urine. Use where natural deer urine is banned Replicates arousing, natural estrous urine Scientifically formulated to drive bucks wild Does not contain deer urine Mid to late seasonal use Synthetic