Our whistles are made from high grade aluminum and can be heard from over a mile away. We are a U.S. Veteran owned company and stand behind our products 110%. Loud sounding whistles - This whistle has been d by professionals using state of the art equipment. The sound is up to 125 decibels. It's very easy to blow and can be used in all weather conductions. The material is compact aluminum with high strength. It can be used in rainy or cold weather and will not rust or break. Resistant to shocks. Easy to find: Bright colors. Easy to spot. Easy to clip/attach: This whistle has a clip design. It can be clipped on your belt/backpacks/life vest and etc. You can also attach it to you using a lanyard. The whistle is light. Thanks to the clip design, it's convenient to bring with you. No matter day or night, this safety whistle will definitely get you out of a lot of troubles. Recommend it to your relatives and friends. Get one for your needs today!