X-Stream Fetish Urine is a synthetic urine product primarily used for novelty or fetish purposes, as well as for calibrating urinalysis equipment. It is formulated to closely resemble the appearance, temperature, and chemical composition of real human urine. Typically sold in kits, X-Stream Fetish Urine includes a vial of synthetic urine, a temperature strip, and sometimes a heating pad to maintain the urine at body temperature.