Proof that sometimes the best things come in small packages. The Storm All-Weather Safety Whistle is the loudest whistle on the market…. even underwater up to 50 feet. Its patented design has structured the chambers so that they force the water to be pushed-out when the whistle is blown. Its high frequency sound has more power than pretty much any other referee or safety whistle. Whether to get your snorkeling companion’s attention or to find each other in the woods, whistles are just one of those little things that provide so much more value than their size.