Lightweight travel companion: Designed with an entire bag concept, this hydration pack minimizes weight with nylon material, delivering a lightweight experience that reduces burden during travel. Ideal for longdistance runs or hikes in any environment. Large capacity main bag: Provides a largecapacity main compartment to neatly organize items—from safety gear to multiple small musthaves—meeting outdoor travel storage needs. Ergonomic design for all shapes: Adjustable shoulder straps and accessible side pockets accommodate various body types for a comfortable, fit. The density breathable mesh wicks moisture and minimizes pressure during workouts. Be seen day and night: visibility reflective elements on the shoulders and back strips enhance safety by warning passing vehicles during night travels. Use scenarios Longdistance running or hiking in diverse environments, where light weight, ample organization, and a secure fit improve endurance and comfort. Outdoor trips requiring easy access to safety gear and small essentials, with a spacious main compartment and practical pockets. Night or earlymorning activities such as running or commuting, where reflective features enhance visibility and safety.