Features: It combines the functions of a water bottle backpack, reflective running vest, hiking bag, and sports phone backpack to meet various outdoor activity needs. The vest is make of reflective materials to enhances visibility and protect your safety during nighttime running. Equipped with a dedicated water bottle pocket, it is convenient to carry the water bottle and replenish water anytimes during exercise. Provide sufficient space to carry a kettle, phone, wallet, keys, and other essential for easily outdoor exercise. Suitable for outdoor runner, providing a convenient and safe way to carry water bottles and essential. Suitable for mountaineering and hiking activity, can carry necessary equipment and items. Specifications: Materials: Polyester Size: about 20x13cm/7.87x5.12inch Package Includes: 1Pc Running Vest note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.