Extended capacity and storage This running vest with a 1.5L water bladder is designed to hold a 1.5L water pump or cleaning equipment and provides extra space in your travel backpack for phones, snacks and more. Stay hydrated on the go. Note: water pump not included. Environmentally friendly materials and comfort Made from strength lowdensity PE, this vest delivers impact resistance and reliable durability. It also offers breathability for longwear comfort during travel or workouts. Safety at night Front and back reflective strips enhance visibility during nighttime outdoor activities, allowing you to train with greater peace of mind. Reinforced straps and stability Constructed from nylon with reinforced straps and an antifall design, this hydration backpack is built for stability and reliability during movement. Use scenarios Longdistance running or trail workouts: keep hydration handy while storing your phone, keys and snacks in the expandable pocket space. Hiking or outdoor adventures: carry water, cleaning gear or small tools securely while remaining comfortable on rugged terrain. Travel, commuting or casual outdoor activities: convenient hydration plus extra room for daily essentials without adding bulk. Performance and compatibility Capacity: 1.5L water bladder compatible; supports storing a water pump or cleaning equipment as needed. Material: strength lowdensity PE for durability and impact resistance. Comfort: breathable design suitable for extended wear. Visibility: reflective strips on front and back for lowlight safety. Construction: nylon with reinforced straps and antifall features for stability. Note: water pump not included. This description stays true to the product's purpose as a water bladder running hydration backpack with extended storage, reinforced durability, night visibility, and stable, comfortable straps.