Soooo glad I got these!
I have all kinds of whistles. Not satisfied with any, fully, so I tried these.
PROS: Makes a loud noise with small amount of breath (crucial in a true emergency). Smallest-lightest-cheapest whistle on the market; attach one to each article of clothing.
CONS: Orange is not tactical. Keep it on a lanyard or as a zipper pull - you might choke on it, it's that small!
Reviewed by: DAVID SINGER from Taxachusetts.