Waterproof safety whistle (No Pea, No Jams). Bright orange with a solid 4mm black nylon cord and a golf ball stopper. A marine cord lock makes for a good attachment to your wrist and leaves your hands free. Great for walking or easily attached to a Life Jacket, BC jacket or clothing etc and ideal for all watersports including Scuba diving. The whistle also has a built in belt clip. Extremely loud and easy to blow when cold / wet meeting the new safety standard ISO 12402-8. Quality nexus whistle. Please see our other whistles we have a good selection.