Durable water resistant nylon made double shoulder backpack
Adjustable shoulder strap with plug buckle， easy to fit your size and convenient to use
With some plastic rings for you to hang something like keys， glasses， mobile phone ( if there is a hook on it )， etc.
Chest belt with plug buckle， reduce the weight for your shoulder and back - the buckle is specially designed with whistle
20L large capacity for you to hold lots of supplies， and extra designed with helmet mesh pocket
Humanization design， multiple compartments to cater to your needs and comfortable to back-up