Code Blue™ Synthetic Doe Estrous has been scientifically formulated to replicate the smell and performance of natural doe estrous urine. Through years of extensive research and testing, Code Blue™ has developed a synthetic scent that performs like real urine. Unlike real urine, synthetics will not break down and reduce effectiveness, and they are legal where real urines aren't. Code Blue's™ Synthetic Doe Estrous is ideal for use in active scrapes, mock scrapes, on scent drags and scent wicks. Unleash the scientifically-proven power of Code Blue™ Synthetic scents.