A whistle is an essential item for travelers, outdoor enthusiasts and urban adventurers. Our plastic emergency whistle is the simplest, lightest solution to your emergency alert needs. The lightweight plastic construction is rust-proof and durable. The high-vis neon color is easy to locate quickly. Our design excludes the "pea" that's a common source of failure for other whistles. At .4 oz in weight, this product is light enough to disappear into your backpack, purse or suitcase.