Zipper closures: It's safe to assume the main compartment and pockets have zippers, which are the standard for securing belongings in backpacks. The image even shows zipper pulls on some pockets.
Zips are totally in a bad condition. The zip runner is not working I thought it might because of some thread but I found zip is damage. I am not in a condition to refund it. But from next time I will not purchase bags from provogue.