• 【Wearing comfortable fit】Running hydration vest, chest buckle can be adjusted up and down, fit the torso, meet different body shapes, do not add extra weight for exercise. Make sure you are breathable and fit properly when cycling, hiking, traveling, etc. L size suggested chest size 41.33 "-47.24"; M size recommended chest size 35.43 "-41.33".
• 【Hydration Backpack】The backpack weighs only 0.25KG / 0.28KG, light weight and breathable, suitable for running, cycling, hiking, cross-country, marathon, skiing and other outdoor sports.
• 【Water bag room】Backpack capacity is 5L, supporting water bags within 2L; Water bag compartment, dry and wet separation, to prevent misoperation resulting in backpack leakage and getting wet. You can purchase a water bag if you need to, so that you can replenish water at any time.
• 【Front reflector】The large front reflector can ensure your safety in dark conditions, cycling and running.
• 【New upgrade】Elastic rope storage; 6.8-inch zipper cabin, can store mobile phones; Hiking pole can be attached, portable travel; Storage bag for small objects.