The ToolTreaux lightweight floating whistles make a loud noise to bring everyone’s attention in the event of an emergency. These whistles are constructed of durable, high-quality plastic that won’t rust or corrode, unlike common metal-based whistles. Plastic is a great material for emergency whistles because it’s lightweight, waterproof, and will stand the test of time, rain, or shine. The lightweight plastic whistles easily float in water and the bright orange color will help you locate them during an emergency in case you drop them in the water. These are ideal plastic whistles for construction workers and outdoor adventurers alike.