---------------------------------------------------------------------- ✔【Lightweight and Adjustable】: Running backpack marathon ultra-light stretch material, only 150g, you might forget you're wearing it! Keep your body in top shape whether you're training for a marathon or cycling. Suitable for various outdoor sports: Use with hydration pouch, such as running, marathon, hiking, mountain climbing, cycling, cycling and other outdoor sports. ✔【Super Pocket】: Trail backpack/drinking waistcoat with multiple compartments. There are two water bottle storage spaces on the front, where you can store your water bottle and cell phone. The water bottle compartment accommodates 150ml and 250ml capacity water bottles (sold separately). One zip pocket can store small items such as keys and handkerchiefs. There is a large compartment on the back for storing lightweight clothing. ✔【High Quality Fabric】: This running backpack marathon is made of high quality nylon material, high density webbing and sturdy buckle. It not only reduces the burden on your shoulders, but also maintains sufficient stability. Also, the inner thin mesh design effectively absorbs sweat, providing you with a perfect exercise experience. ✔【Reflective Strips】: Running There are reflective strips on the back and front, reflective strips improve visibility and safety at dusk and at night. Suitable for cycling, running, marathon, etc. ✔【Breathability and Comfort】: Made of high-density mesh, the fabric breathes and wicks moisture. Ergonomic design, adjustable belt, fits your body and is more comfortable. Are you an outdoor enthusiast who likes to spend your free time running on trails or taking long hikes in your favorite hills? We have prepared some useful items for you. Are you an outdoor enthusiast who likes to spend your free time running on trails or taking long hikes in your favorite hills? We have prepared some useful items for you. specification Name Hydration backpack Material nylon/polyester Weight: 150g gender unisex Color green, gray, pink, blue Chest measurement 78cm-110cm Applications Trail running, road running, night running, cycling, hiking, mountain climbing. Features ✅5L large capacity lace vest weighs only 150g. ✅The back and shoulder pads are made of air mesh, which is breathable and effectively relieves sweat. ✅ Card storage, carry snacks and cards. ✅Zipper storage, can store money and keys. ✅Kettle storage for storing mobile phones and water bottles (compatible with 5.5 inch mobile phones). ✅Adjustable straps help the vest wrap around you freely. ✅Smooth and rust-resistant zipper. ✅Strong and durable zipper. Washing and maintenance methods 1: Waterproof coating fabric. Do not wash with liquid detergent or bleach. 2: Wipe with a wet cloth if necessary. 3: Dry naturally. 4: Do not iron it. Package includes: 1 x Hydration pack