Stay hydrated and comfortable on every adventure with this ultra-lightweight 5L hydration running vest backpack, crafted from durable, water-resistant ripstop nylon and designed to hold a 1.5L or 2L hydration bladder (not included). It features a dedicated main compartment for the water reservoir and daily essentials, an elastic water bottle pocket on the shoulder strap, a small storage pocket, and a shoulder-strap phone pocket for quick access to your phone, keys, or snacks. Breathable mesh padding ensures all-day comfort, while reflective strips enhance visibility in low-light conditions. With an adjustable chest strap and buckle for a secure, ergonomic fit, this hydration pack is perfect for hiking, running, cycling, climbing, and other outdoor activities, offering lightweight performance, smart storage, and improved safety.