Material: NylonColor: Light GreenLining Material: Polyester CottonSport: Running, Jogging, Cycling, Hiking, Trail Racing, Marathon1.Ultralight design: This hydration pack is your go-to companion for cycling, running, hiking or gym. Lightweight, portable, flexible and convenient - our hydration pack is ideal for daily training.2.Smart Multi-Pocket System: Zippered pocket on the front of the running vest - securely store your phone, keys or cards for quick and easy access. Two Storage Pockets: Vertical slots hold water bottles (up to 500 ml), energy gels or protein bars - convenient and ready for you to grab on the go.3.Dual rear compartments: The main compartment can accommodate a 2-liter hydration bladder (not included with this option), and the secondary mesh pocket can store additional gear such as a windbreaker or trail snacks. Use with a hiking pack.4.Breathable, all-weather performance: The 3D mesh back panel and ventilation channels quickly wick away sweat. Even during summer marathons or high-intensity training, this hydration hiking pack for men and women will keep you cool and dry.5.360° reflective design: Reflective piping and logos shine in the headlights, making you clearly visible on pre-dawn runs or night rides.6.Multi-Purpose: Our hiking backpack is suitable for various occasions such as hiking, running, mountain biking, cycling, rock climbing, music carnival, etc. This running hydration vest is an ideal companion for family and friends.Fabric