The photo with flash is better visible colors. The backpack took a small with a valve/lid on the lace. I can say that it is probably better to take a backpack with a zipper, T to hard designs of colors on the surface of the backpack-which is not very convenient and because of this, do not let the ropes tightly tighten/tighten/tie the backpack. Because of what remain on the sides of the lid untightened edges, where rain, snow, dirt, dirty hands of thieves can get. The idea itself is cool, I advise you to take a larger size and with a zipper.