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.