• Only running vest: This package is just a hydration backpack, not including water bladder or water bottles
• Adjustable: The adjustable waistband makes the backpack fit you perfectly and prevent the backpack from moving, and wide mesh shoulder strap helps to reduce the burden of your shoulder. Super hydration vest provides you max support and min burden
• Multi-pocket design: Provides you with plenty of space to store your belongings. Multi-pocket design, your water bottle, phone, key, money, food can be easily stored in the front pocket, and hydration bladder or other items can be placed in the back pocket
• Breathable & ultra-light: The hydrated backpack is made from lightweight, breathable mesh and high-quality nylon fabric, that's very lightweigh and comfortable and durable. Soft and lightweight mesh on the back and shoulder straps for maximum breathability
• Marathoner hydration vest: Our waterproof running water vest can accompany your running, jogging, marathon, climbing, hiking, cycling, biking, walking, backpacking, traveling, etc. It is the hydration backpack designed for men, women and youth