Style: Black Material: polyester Capacity: about 3L Key benefits Safety in low light: Reflective highlights and targeted illumination zones increase visibility from all directions, helping reduce risk during early morning or evening activity. Comfortable, secure fit: Adjustable straps and an ergonomic veststyle design keep the pack snug without restricting movement, reducing strain on shoulders and back during long efforts. Organized, expandable storage: A 3L main compartment with elastic expansion band and layered pockets lets you separate essentials for quick access and flexible carrying. Practical hydration compatibility: Designed to work with common hydration systems and bottles, it includes hose routing with leakresistant management and a quickfill port for easy refills on the move. Breathable performance: Lightweight polyester construction and ventilated panels promote airflow to help keep you cooler during intense activity. Features Reflective trim and lowlight visibility across critical zones for enhanced safety. Ergonomic vest fit with adjustable support to suit a range of body types and activity levels. 3L storage capacity plus elastic expansion band for added carry volume when needed. Layered organization for efficient item classification and easy access to small gear. Hose management system that helps prevent leaks and tangles and supports quick refilling. Durable polyester material for reliable everyday outdoor use. What is included 1 Running Hydration Vest Does not include a water bottle or hydration reservoir Practical use scenarios Trail running: Carry water, energy gels, and a compact jacket with secure fit and hands hydration for varied terrain. Cycling or commuting: Use the layered pockets for tools, phone, and keys while reflective highlights improve visibility on roads at dusk. Day hiking or fishing: Store snacks, a small first aid kit, and a hydration container while the ventilated design reduces overheating on long outings. Additional notes Item color may vary slightly due to different lighting and screen settings. Please allow a 1 to 2 cm difference in measurements due to manual measurement. This running hydration vest combines visibility, fit, and practical storage to support a wide range of outdoor activities where comfortable, organized, and hands hydration is needed.