Product description:Lightweight, flexible and easy to useAnti-slip silicone is added inside, which is non-slip when exercising.Add a small pocket on the side for keys and change.It's portable and fits snugly without shaking.Arm bag covers headphone jack so you can listen to music while exercisingProduct parametersMaterial: PolyesterSize: as shownPackage Included:1 x Arm bag (other demo products not included)Notice:1. Please allow 2-3% error due to manual measurement.2. Due to different monitors, the color may be different, please understand.It is suitable for a variety of sports, comfortable to wear, frees hands, and can hold mobile phones and keys when going out.