Front and back water supplement to easily drink water without taking the backpack off or stopping your steps.
Adjustable drawstring strap to store your towels,clothes,etc.
Reflective design on the front and the back,provides increased visibility and keeps you safe during nighttime activities.
Excellent air ventilation system consist of breathable mesh back and mesh shoulder straps,prevents stuffiness and releases pressure to your back.
Adjustable side straps and chest straps distribute weight effectively and reduce strength consumption.
Features: Front and back water supplement to easily drink water without taking the backpack off or stopping your steps. Adjustable drawstring strap to store your towels,clothes,etc. Reflective design on the front and the back,provides increased visibility and keeps you safe during nighttime activities. Excellent air ventilation system consist of breathable mesh back and mesh shoulder straps,prevents stuffiness and releases pressure to your back. Adjustable side straps and chest straps distribute weight effectively and reduce strength consumption. 5L large capacity is large enough for storing most daily needs such as cellphone,water bottle,umbrella,power bank,etc. Emergency whistle to convenient to use in some situation. Suitable for riding,running,cycling,camping,hiking,mountaineering,etc. Specification: Material: 85% Nylon + 15% Spandex Suggested Chest Circumference: 68-130cm / 26.8-51.2in Capacity：5L Size: 40*18*40cm / 15.8*7.1*15.8in Weight: approx. 120g / 0.3lb Package List: 1* Backpack