Waterproof - This whistle is equipped with a watertight compartment that can conceal your emergency contact information. Includes Emergency Contact Paper - The top of the whistle can be screwed off and an emergency or survival information paper is inside. Paper includes: name, sex, date of birth, telephone, blood type, allergies, address, contact person, medicine, etc.

Where To Use - Camping, hiking, emergency situations, boating, skiing, climbing, biking, survival, trekking and other outdoor activities. Design - Comes in 5 different colors: blue, sliver, black, orange and green. 

Weight: .3 oz each