• PVC
• Whistle for outdoors-- widely used as a keychain decoration can also be used for referee whistle,survival whistle handheld
• Death whistle-- compared with many traditional whistles, our hand squeeze whistle is convenient and practical,yoga whistle
• Sport whistle with bracelet-- no matter you are a referee outdoor activities fan, and you need a whistle, then our hand squeeze whistle will be your ,camping whistle
• Survival equipment-- also, can be a for your friends who like outdoor activity, they will like it,multi-function squeeze whistle
• Wristbands-- making a loud sound by hand squeeze, it is suitable for outdoor survival, sports competition, etc,emergency whistle