When opening the backpack, turn the logo side towards you. This allows it to open wonderfully, and you have everything immediately at hand.
When closing the main compartment, please ensure that the two zippers are on the right or left. If the zippers are at the top, the backpack may open while walking (this is normal and is due to the slight back-and-forth movement of the water bottle).
Tighten the three straps (shoulder, chest, waist) to fit you snugly so that the backpack is close to your body. This will give you an upright posture, and the backpack will move with you as you walk.