Description: Design: This running arm bag is designed for both arm and wrist use, featuring a double layer storage system that is waterproof, lightweight, and breathable.Spacious Storage: The double layer can accommodate daily items such as mobile phones, keys, ID cards, headphones, and chewing gum. It features a front zip pocket and a large capacity main pocket.Waterproof Material: Made from quality Oxford cloth and polyester that is wear resistant and waterproof. It ensures your belongings are protected from rainwater.Comfortable Fit: The back wing design provides added stability while the mesh ventilation holes prevent overheating for comfortable wear during workouts or runs.Wide Application: This Gym Arm Band Pouch is suitable for most activities such as jogging, running, climbing, hiking, cycling, and indoor outdoor gym workouts. Size Chart: 9.5cmx18cmx4cm/3.74inchx7.09inchx1.57inch Package Includes: 1Sports Armband Note: Please allow slightly errors 1-2cm differences due to manual measurement.