Plastic Whistle with Thick Lanyard: High Strength Plastic Fox Top Line Whistles - For Coaches, Boating, Lifeguard, Instructor, Key chains, Referees. Better than metal and stainless steel 100% High Quality High Impact ABS Plastic - Extremely durable and impervious to moisture and will never rust, wear, or melt like wood, metal, and cheap plastic Jam Free Design - due to the no cork ball and no moving parts unlike most whistles this whistle will work in almost any condition, rain, snow, cold or heat. Used By Professionals - First Choice of; NFL, NCAA, NBA, CFL FIBA and FIFA Adjustable Sound - Depending on how hard you blow will dictate the loudness and sound of the whistle Perfect for all sports and or survivalists - Sold in 1 pack and 2 pack, get better deal by ordering the 2 pack.