Material: The sports whistle is made of food grade stainless steel, which is durable, safe and reliable. They last longer and always look brand new. Clear and Loud: The safety whistle is loud enough to grab the attention of the crowd anytime, anywhere. You can use it easily and effectively in any situation. Easy to carry: Each rescue whistle has a durable, compact, lightweight and unique lanyard, you can hang the whistle around your neck to free your hands. MULTIPLE USES: These rope whistles are suitable for referees, coaches, teachers, survival, school, emergency, gym and more. The sports whistle can also be given as a Christmas gift to children and friends. Package Content: Stainless steel package includes 4 whistles and 4 lanyards, better to use anytime, allowing you to send different men you like.