High Quality Materials: Made of high-quality materials, light and durable, waterproof and sweatproof, soft and breathable, so that your valuables are protected from sweat or rain. Comfortable Adjustable Belt: The Waterproof Bumbags with adjustable length can be stretched up to 120cm, which fits most people's waist circumference and will not make you feel uncomfortable or burden your body. Reflective Strip:The Waterproof Bumbags has a reflective strip, so you will be noticed by other vehicles when you run at night, ensuring the safety of running at night. Unique Design: The thoughtful headphone jack design allows you to exercise while listening to songs, making exercise more interesting Wide Application: Our running belts are very suitable for fitness, walking, jogging, cycling, mountain climbing, gym exercise, picnics, traveling and outdoor activities.