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Synthetix5 is a pre-mixed synthetic urine belt kit that serves as the perfect alternative to your own pee! Although it was crafted in a laboratory, this stuff is nearly identical to real, human urine so it’s perfect for urine fetish play or for calibrating your urine testing equipment. Synthetix5 has the appearance and texture of natural urine because it contains creatinine, urea, uric acid, and many other chemicals typically found in human pee. It even has the proper balance of pH and specific gravity to provide the most lifelike experience possible.