Universal Size: Compatible with most standard sizes and shapes of whistles
Easy Installation: Simply slip it onto the whistle for easy use
Multi-functional Set: Suitable for various sports such as soccer, basketball, volleyball, running, etc
Protective Design: Effectively prevents the whistle from getting wet and dusty, protecting it
Durable Material: Made of high-quality transparent plastic, it is moisture-proof and dust-proof, effectively protecting the whistle and extending its lifespan"