High-density and Waterproof Nylon Fabric:The waist bag use high-density and waterproof nylon fabric. It can be abrasion-resistant and scratch-resistant and block water molecules to protect the contents of the bag. Adjusting Buckle & PVC Buckle: The shoulder strap of the bumbag has two sturdy buckles. One is the adjustment buckle, and you can adjust the shoulder strap to fit your size. The other is the PVC buckle, which is easy to disassemble, and it is not easy to break after long-term repeated insertion and removal. Unique Earphone Cable Hole:There is a headphone hole on the right side of the running bag. You can put your mobile phone in the bag to draw out the headphone cable when you are running, cycling, or exercising, allowing you to listen to music while exercising. And won't damage your earphone cable easily. Lightweight and Foldable: The dog walking bumbag weighs only 60 grams and has a thickness is about 1 cm, which is very light. It is close to the body and comfortable to use without shaking, allowing you to exercise without restraint. When not in use, it can be folded and stored without taking up extra space. Three Different Ways to Use: You can use the small sports bag as a waist bag, chest bag and shoulder bag. The three-layer design makes it convenient for you to classify and carry different items, such as mobile phones, ID cards, transportation cards, wallets, change, power banks and keys, etc.