These whistles are composed of durable, fade-resistant, and high-quality plastic that will last. Our grip plastic whistles are great for many different purposes! Great party favors, useful for sporting events, training, lifeguards, referees, coaches, boating, survival, emergency, and much more. We are pretty sure that every plastic whistle produced creates a great loud and crisp noise. Our whistles are manufactured with premium plastic that is not harmful to health.