The 50-Pack Metal Whistle & Lanyard Emergency Survival Kit by SE is a versatile and essential outdoor survival gear perfect for camping, hiking, and other outdoor activities. Each whistle is made of durable metal and comes with a lanyard for easy carrying. This survival kit is perfect for emergency situations, but also useful for signaling during outdoor adventures. With a total of 50 whistles included, this pack ensures that you will always have backups on hand for any situation.