The Whistle Paracord medical bracelet is designed for your safety in mind. It is made of super durable cord that could be used for tourniquets, securing, splints, trapping, fishing and dozens of other survival uses. The built-in whistle on the buckle is an immediate way to call out for help. The medical ID tag offered with this bracelet is interchangeable with any of our chain, cable, leather, rubber, stretch, woven or beaded bracelets. Another plus to the paracord medical bracelet is the metal does not touch your skin. This paracord medical alert bracelet is ideal for those allergic to metals!