The HRM strap stands approximately 100 washes at +40ºC/warm with most common laundry detergents. Detergent should not contain optical brighteners or bleaching agents. Use of soap or fabric softeners is not recommended. Use of laundry pouch is recommended. It is recommended to rinse strap with water after every use and machine wash strap after every fifth use. Sports Tracker Heart Rate Monitor strap does not resist soaking, dry-cleaning or bleaching. Store Sports Tracker Heart Rate Monitor strap and the transmitter separately and not folded from sensor area in storage conditions mentioned earlier. Do not expose strap to direct sunlight or cold conditions for extended periods.