Only backpack: This package is just a hydration backpack, not including water bladder or water bottles
Lightweight & no shake: The hydration pack provides a tight, comfortable and non-swaying fit that won't shift even during running. The hydration vest with ultra-light design for maximum support and minimal burden
Multi-pocket design: Multi-pocket design can meet all your sports needs. Water bottles, mobile phones, keys, money, food can be easily stored in the front pocket of the backpack; water bladder, light jacket and other items can be stored in the back pocket. The vest backpack can give you plenty of storage space
Waterproof hydration pack with a running water reservoir for marathoners, joggers, climbers, hikers, cyclists, walkers, backpackers, travelers, etc. Suitable for men, women, and children.
Nylon
Adjustable bust vest: Sturdy durable buckle + high density webbing band, the trail running backpack is suitable for chest size 31.5 - 47.3 inch kids men's or women’s. The one size military hydration vest is free size, fit your waist length freely