Lightweight travel companion Designed with an entire bag concept, this hydration pack uses nylon material to minimize weight, providing a light, Burden experience for travel. It is suitable for longdistance runs or hikes in any environment. Large capacity space Main compartment features a large capacity with enhanced safety features and multiple storage bags and compartments, helping you keep outdoor travel necessities organized and easy to access. Optimized comfort Includes spare adjustable shoulder straps and convenient side pockets to fit a range of body shapes. The pack uses density breathable mesh that manages moisture effectively for a comfortable workout or activity. Nighttime safety Reflective strips improve visibility in low light, helping to support safer night travels. Use scenarios Longdistance running on road or trail: lightweight design plus organized storage makes hydration and essentials easy to access without added bulk. Weekend hikes or multiday excursions: large capacity and multiple compartments support orderly packing of gear and supplies. Nighttime or early morning activities: reflective strips enhance visibility for safer travels in low light. Product attributes Material: nylon Function: hydration pack with lightweight design, large main compartment, multiple storage bags and compartments, adjustable straps, moisturewicking breathable mesh, and reflective safety features Size and capacity: large capacity main compartment with organized storage Comfort and fit: spare adjustable shoulder straps, side pockets, density breathable mesh Safety: reflective strips for nighttime visibility