1)  600D PU oxford,ripstop nylon,1000D nylon, made this bag durable and tough

2)   Large volume main compartment

3)   Side band,keep things inside in orders as you put them in

4)   SBS zipper and YNS buckles

5)   Strengh nylon webbing handle

6)   Airmesh ,soft and breathable

7)   With emergency whistle

8)   Adjustable shoulder strap,sternum strap and hip belt  

9)   Reflective tape on the shoulder strap, more safe when you walking or cycling in the dark