Shenzhen Lishang International Trade Co. Ltd.   

        supply Korean fashion cute cartoon PU
[information] with cartoon printed PU waterproof handbag
open cover: zip  
bags: vertical section shape of square  
No.: 122021 
styles: backpack / Backpack  
[backpack zipper introduction]
zipper is composed of a chain, belt, zipper teeth chain head, and a locking slide fastener component. Any object in the application of a long time will have a fatigue limit, all know. Beyond the fatigue limit will be very easy to damage, which is why I often ask people don't always wears a pair of shoes and so are two pairs of shoes to take turns for wear reason above shoulders backpack zipper, if applied with a long time will arrive in a fatigue limit so as to affect my application. Of course this is just one of the reasons, the relevant backpack take double zipper interests,
summed up the following points: 1 the fault reducing shoulders backpack in the application process of rate, a slide fastener damage can also be used zipper another head, does not affect the application continues to double shoulder bag, prevent field suddenly not account outsourcing problems.
2 because of the both ends of the zipper can be pulled, so put two zippers are pulled together coincident, with a small lock, not to feel a sense of security, maintenance of privacy while still anti-theft, really shoot two hawks with one arrow.