Description:Put the WF-C500 earbuds in our anti-lost cord and never worry about your blue-tooth earbuds falling and losing. It has excellent elasticity and is not easy to break. You can use it while exercising, running, cycling, or going to work or school.Specification:Name: Earphone StrapMaterial: SiliconeColor: black, greenPacking List:Anti Lost Strap *1Note:1. Due to the lighting effects and shooting angles, there is a color difference in the product, please understand.2. Due to manual measurement, there is a tolerance in the product size.