Well ... just the bag for the first time packed (should the day after the travel start) ... clear the zipper that you loaded a little more at a packed bag ... but I really do not exert force exerted - only pulled firmly. .. and what happens? I have the clasp of the zipper in his hand!
ANY zipper at a cheap jeans holds anymore!
So good are the materials of the case, as well, the bag is sewn inside and outside ... the zippers are billigster crap ... and that's my opinion, a knock-out criterion!