Scotty Lifesaver #1 Safety Whistle. The world's most advanced all-purpose safety whistle. Designed by search and rescue professionals. Newly designed synthetic peas will not absorb moisture or freeze. Works when soaking wet - clears instantly. ABS Plastic will not stick to mouth in cold weather as metal whistles do. Double chambered for multiple pitches. Waffled sure-grip. Meets anti-choking standards for children. Large tooth-grip for hands free use. Lip-seal prevents loss of air in extreme cold.